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The Official Site of the Seattle Mariners

On BASE Coaches Clinics 2019

Improve your baseball and softball coaching skillset the Mariners way!

In 2019, the Mariners are proud to offer dozens of On BASE Coaches Clinics throughout the Pacific Northwest to local youth coaches looking to improve their practices as a coach, mentor, and motivator.

The Mariners believe that positive playing experiences in youth sports starts with committed coaches. Join Mariners coaches, personalities, and Mariners Grand Slam Camps Founder and Lead Trainer, Mark Zender, at the On BASE Coaches Clinic nearest to you.

  • Learn how to implement practical techniques to help young ballplayers of all skill levels excel and improve.
  • Gain insight on how to provide a positive playing experience and supportive team environment.
  • Engage with members of the Mariners coaching staff at signature On BASE Coaches Clinics through interactive Q&A sessions.

2019 Mariners ON BASE Coaches Clinic Schedule

January 26th
On BASE Seattle Coaches Clinic at T-Mobile Park, Ellis Pavilion: 10:00 a.m.-12:00 p.m. Featuring Scott Servais, Andy McKay, and Angie Mentink. RSVP >>

February 2nd
Mariners Grand Slam Camps Poulsbo Coaches Clinic at North Kitsap High School: 9:00 a.m.-11:00 a.m. 

February 2nd
On Base Tacoma Coaches Clinic at Cheney Stadium, Summit Club: 1:00 p.m. - 3:00 p.m. Featuring Angie Mentink.  RSVP >>

February 9th - CANCELLED DUE TO INCLEMENT WEATHER
On BASE Bellevue Coaches Clinic at Bellevue College, Paccar Atrium: 9:00 a.m.-11:00 a.m. Featuring Dan Wilson. 

February 9th - CANCELLED DUE TO INCLEMENT WEATHER
On BASE Lynwood Coaches Clinic at Lynwood High School: 1:00 p.m.-3:00 p.m. Featuring Bill Krueger.

February 13th
Mariners Grand Slam Camps Maple Valley Coaches Clinic. Black Diamond Camps: 7:00 p.m.

February 16th
Mariners Grand Slam Camps Renton/Kent/Auburn Coaches Clinic at Kentwood High School: 9:00 a.m.-11:00 a.m.

February 16th
Mariners Grand Slam Camps Bonney Lake Coaches Clinic. Location details TBD. 1:00 p.m.-3:00 p.m.

February 17th
Mariners Grand Slam Camps Vancouver Coaches Clinic. Gaiser Middle School. 1:00 p.m.-3:00 p.m. 

February 19th
Mariners Grand Slam Camps Sammamish Coaches Clinic #1. Inglewood Middle School: 7:00 p.m.-9:00 p.m.

February 21st
Mariners Grand Slam Camps Sammamish Coaches Clinic #2. Inglewood Middle School: 7:00 p.m. - 9:00 p.m.

February 22nd
Mariners Grand Slam Camps Federal Way Coaches Clinic at Federal Way National Little League Complex: 7:00 p.m.-9:00 p.m.

February 23rd
Mariners Grand Slam Camps Seattle Coaches Clinic #2 at St. Anne School: 9:00 a.m.-11:00 a.m. 

February 23rd
Mariners Grand Slam Camps Snohomish Coaches Clinic. Glacier Peak High School Library: 1:00 p.m.-3:00 p.m.

February 23rd
On BASE West Seattle, Rainier District & Seattle Central Coaches Clinic at T-Mobile Park: 9:30 p.m. -11:30 p.m. (Tee Ball), 12:30 p.m. -3:00 p.m. (Coach/Machine Pitch), 4:00 p.m. - 6:00 p.m. (Player Pitch Levels)

February 24th
Mariners Grand Slam Camps Thurston County Coaches Clinic at Mills & Mills Tumwater: 1:00-3:00 p.m.

March 3rd
Mariners Grand Slam Camps Shoreline Coaches Clinic at Spartan's Gym: 2:00 p.m.-4:00 p.m. 

March 10th
Mariners Grand Slam Camps Gig Harbor Coaches Clinic. Event details TBD. 

March 10th
Friends of Baseball Portland Coaches Clinic presented by Mariners On BASE. Multnomah Athletic Club. Featuring Brian Hunter.

March 17th
Mariners Grand Slam Camps Yakima/Selah Coaches Clinic. Event Details TBD. 

For questions regarding the clinics, please email Mark Zender at mzender@marinerscamps.org or McKenzie Mitchell at mmitchell@mariners.com.

Space is limited. Please RSVP to reserve your spot.

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