T-Mobile Park Campers Day:
Additional camp session included with your camp fee and is exclusive to Mariners Grand Slam Campers, their parents/guardians, and siblings.
***Returning campers take note: The 2018 T-Mobile ParkDay will be
a different, more hands on event than the 2017 T-Mobile Park Day.
**Held at T-Mobile Park in Seattle.
**Date set as August 21, 2018
**Seattle Mariners coach(es) will conduct an instructional session
**Prizes and Giveaways
**Interactive activities
"Root, Root, Root for the Mariners at the Old Ba
ll Game!"
Quick question about camp?
Fill out and hit "submit"
SEE IMPORTANT
2026 MESSAGE
BELOW
QUESTIONS ABOUT CAMP?
All Camp Session Start & Finish times:
- Complete: start- 9:00am finish-12:00pm (bring snack for break time)
- Skills (Pitcher, Catcher, Infielder): start- 12:30pm finish-3:00 (bring snack for break time)
- Complete + Extended Day : start- 9:00am finish-3:00pm (bring snacks and your lunch, supervision is provided during lunch break)
- Complete + SkillsBundle : start- 9:00am finish-3:00pm (bring snacks and your lunch, supervision is provided during lunch break)
-Choose Baseball or Softball-
Half Day or Full Day
- Complete Camp- Half Day Mornings(3rd-6th Grade) Covers the whole game!
- Skills Camp- Half Day Afternoons (3rd-6th Grade) Emphasis on chosen defensive skill & daily hitting practice
- Complete + Extended Day- Full Day (1st & 2nd Grade) Complete as above + added age based skills and hitting instruction.
- The Complete + Skills Bundle- Full Day (3rd-6th Grade) The best of Complete & Skills camps!
Confirmed2024 Softball Camp Schedule
***IMPORTANT 2026 MESSAGE***
It is with great sadness that, after serving the youth baseball and softball community throughout the Pacific Northwest since 1993, we will no longer be operating our unique and popular camps. Know that this was not the choice we had hoped for. Our situation being much like "The Shop Around the Corner" from the 1998 Tom Hanks and Meg Ryan movie "You've Got Mail".
Please be aware that any replacement camps that appear in form or function as Grand Slam are not and will not be Grand Slam operated and will not be the one-of-a-kind camp experience you have come to appreciate and expect.
It has been a true pleasure and thrill to serve multiple-generations of 'happy campers' and instill the 'love of the game' in many young hearts for the past 30+ years. Thank you to YOU, our Grand Slam family, for all your support over the years. We are proud to say that no child was ever turned away due to inability to pay, prices were intentionally kept affordable- always below industry standard- and our camper experiences were unmatched memory makers in the sports camp world. We wish everyone the very best. May your lives be filled with green grass, summer sun, a bat, ball and glove and most especially the joy and innocence of childhood!
Grand Slam Camps
All camp sessions include:
- Professional, experienced educators and instructors
- Grand Slam Camp T-shirt
- Daily Trivia, giveaways and drawing prizes
- Daily trading card giveaways
Confirmed 2024 Baseball Camp
Schedule
An email response will be sent to you.
PLEASE, CHECK YOUR JUNK/SPAM BOX!!!
& STATUS
If you have signed up:
An email has been sent to you.
PLEASE, CHECK YOUR JUNK/SPAM BOX!!!
All Camp Sessions (Complete, Bundle and Skills) Include:
**Appropriate for "All Stars" and Beginners using our effective and time-tested Age and Skill P.C.A.** based instruction
**Reinforcement of proper individual skills *Personalized individual and team concept coaching
**Professional, experienced educators and instructors *Positive Baseball /Softball culture deeply embedded
**Mariners Grand Slam Camp T-shirt for each camper * Daily trading card giveaways and trading
**Daily Trivia and fun facts *Daily giveaways and drawing prizes
**P.C.A. (Postive Coaching Alliance) Certified based Instruction
2024 Camp Registration is now open!
Your can reach the new website at This Link!
Camp online registration is atThis Link!
Fastpitch Softball Camps
All Camp Sessions include:
- Professional, experienced educators and instructors who are current coaches or college players
- Learn the game the MARINER WAY!
- Mariners Grand Slam Camp T-shirt
- Daily Trivia, giveaways and drawing prizes
We have 3 Fastpitch Softball Session Choices:
#1 The Complete Softball Camp - Covers the Whole Game!
Four Days 1st to 6th Grade (Kindergarten OK with some baseball experience) • Morning Half-Day = 9:00 AM - 12:00 PM
**Personalized and team coaching**
**Introduction and reinforcement of proper softball individual skills**
**Coaching emphasis on in-game concepts and situational play.**
**Ball playing culture deeply embedded.**
- Pitching
- Batting
- Catcher
- Bunting
- Infield Play
- Baserunning
- Outfield Play
- And much more
***Fun atmosphere (like Summer Camp!)***
***Lots of softball is played to practice skills***
***Low coach-to-camper ratio!***
#2 The Softball Skills Camp-Choose a defensive skill (Pitcher, Catcher, Infielder) to focus on + daily hitting practice and instruction.
Advanced Skills• Four Days 3rd to 6th Grade
Afternoon Half- Day = 12:30 - 3:00 PM
- Emphasis on chosen defensive skill & hitting
- Camper chooses Pitcher, Catcher or Infielder defensive focus.
- In-depth, personalized, progressive instruction focused on hitting and chosen defensive skill.
- Hitting instruction – includes daily batting practice for all.
- Includes plenty of the positive culture of our national pastime!
- Take your game to the next level!
All receive focused daily hitting instruction
Camper chooses one defensive position
- Pitcher
- Catcher
- Infield Play
In-depth techniques and drills specific to chosen position +personalized hitting instruction.
- Mechanics
- Mental Approach
Lower coach-to-camper ratios!
#3 The Complete and Skills Softball Camp Bundle
BOTH the Softball Complete AND Skills camps sessions (above)
Our most popular option!
Four days • 9-12 year olds (8-yr olds OK with experience) • 9am to 4pm
Well rounded experience touching on all aspects of the game while experiencing numerous batting and fielding game situations. Followed by a more focused specific area of defense you choose to work on as well as more personalized hitting instruction.
For this session supervision is provided during the one hour break between morning and afternoon sessions at no additional cost.
Campers must bring their lunch.
Baseball Camps
All Camp Sessions include:
- Professional, experienced educators and instructors who are current coaches or college players
- Learn the game the MARINER WAY!
- Mariners Grand Slam Camp T-shirt
- Daily Trivia, giveaways and drawing prizes
We have 3 Baseball Session Choices:
#1 The Complete Baseball Camp - Covers the Whole Game!
Four Days 1st to 6th Grade (Kindergarten OK with some baseball experience) • Morning Half- Day = 9:00 AM - 12:00 PM
**Personalized and team coaching**
**Introduction and reinforcement of proper individual baseball skills**
**Coaching emphasis on in-game concepts and situational play.**
**Baseball culture deeply embedded.**
- Pitching
- Batting
- Catcher
- Bunting
- Infield Play
- Baserunning
- Outfield Play
***Fun atmosphere (like Summer Camp!)***
***Lots of softball is played to practice skills***
***Low coach-to-camper ratio!***
#2 The Baseball Skills Camp-Choose a defensive skill (Pitcher, Catcher, Infielder) to focus on + daily hitting practice and instruction.
Advanced Skills • Four Days 3rd to 6th Grade
Afternoon Half- Day = 12:30 - 3:00 PM
- Emphasis on chosen defensive skill & hitting
- Camper chooses Pitcher, Catcher or Infielder defensive focus.
- In-depth, personalized, progressive instruction focused on hitting and chosen defensive skill.
- Hitting instruction – includes daily batting practice for all.
- Includes plenty of the positive culture of our national pastime!
- Take your game to the next level!
All receive focused daily hitting instruction
Camper chooses one defensive position
- Pitcher
- Catcher
- Infield Play
In-depth techniques and drills specific to chosen position +personalized hitting instruction.
- Mechanics
- Mental Approach
Lower coach-to-camper ratios!
#3 The Complete and Skills Baseball Camp Bundle
BOTH the Baseball Complete AND Skills camps sessions (above)
Our most popular option!
Four days • 3rd to 6th Grade
FULL DAY• 9am to 4pm
Well rounded experience touching on all aspects of the game while experiencing numerous batting and fielding game situations.
Followed by a more focused specific area of defense you choose to work on as well as more personalized hitting instruction.
For this session supervision is provided during the break between morning and afternoon sessions at no additional cost.
Campers must bring their lunch.
#4 The Complete and Extended Day Baseball Camp
The Complete +Extended Day of added age-based skills and instruction
Tell me about Grand Slam Camps.........
Grand Slam Baseball and Softball Camps are real summer camps, like parents remember from their childhood. You can count on top quality and personal instruction while having a blast. After all, it is a game and should be fun - lots of fun! Compare us to other sport camps. You will find that unlike other summer camps; we cater to all-stars AND beginners. We provide a staff that loves the game, knows the game and loves working with kids. Some camps out there are the other extreme and take things too seriously; they just don't have any fun. We do!
Our balanced approach ensures a great experience for all, maximizes each camper’s ability to play and perform, and has been working since1993! One of the great things about the game is its culture and emphasis on hustle, sportsmanship, looking sharp, respect, class, history and enthusiasm. The culture of baseball and softball are big themes at our camp reinforced with daily prize drawings, trivia sessions & giveaways. We offer a truly unique experience. We are confident that Grand Slam Camps are second to none.
We offer Baseball or Fastpitch Softball Camps in Washington and Oregon. Including King, Pierce, Kitsap, Clark, Thurston, Snohomish & Spokane County Washington and Multnomah, Clackamas, Washington County Oregon.