“Never Stop Growing In The Game“
CheckRock is a youth-focused basketball organization founded in 2015 in Wilmington, Delaware, by Lamar Mason. Born from a desire to provide structured opportunities and mentorship to young athletes, CheckRock has grown into a competitive league and development platform in the Tri-State area built around the belief that “It’s Bigger Than Basketball.”
In addition to organized league play, CheckRock offers a variety of training and development programs — from skill clinics and night training sessions to youth camps and clinics — all focused on fundamentals, teamwork, and personal growth.
The CheckRock Platform is a purpose-built development and exposure system designed to grow athletes the right way. By introducing players to structured competition at a young age and guiding them through progressive leagues and circuits, CheckRock creates a clear ladder of success rooted in true development.
Communities Build Communities — and that’s exactly what CheckRock League represents.
CheckRock League is the premier summer basketball league in the region, hosted in Wilmington, Delaware. CheckRock has served as a powerful foundation and development platform for over 120 players each season since 2016, with many alumni advancing collegiately to top Division I programs in the country and some athletes making it to the professional level.
Beyond basketball, Girl’s Run It creates a community-driven environment where women entrepreneurs and local businesses sponsor teams, showcase their brands, and invest in the growth of young women in sports. With corporate sponsor packages available, this initiative unites athletics, business, and culture — celebrating excellence both on and off the court.
Out of Your League (OYL) — formerly known as “OYL” — is one of the premier middle school summer leagues in the region, operating under the CheckRock umbrella.
Now powered by Dick’s House of Sport as its Title Sponsor, OYL is entering a new era — one that expands partnerships, access, and opportunities for youth across the area.

HER Flowers League is the little sister league to Girls Run It, built to uphold the same standard of excellence and competitiveness. Designed for 7th and 8th grade girls, the league mirrors the intensity, structure, and exposure of the high school division—because development and visibility shouldn’t wait.

Young Stars Circuit is the premier league for 10u and 11u athletes who love to compete, learn, and grow in basketball. While these athletes are just beginning their journey in organized leagues, many are already travel team players, bringing skill, energy, and a competitive spirit to every game.

Rising Tykes is built for our 2nd & 3rd grade co-ed division — the youngest hoopers in charge! It’s all about introducing the game in a fun, structured, and confidence-building environment.
Game Recognize Game.
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