Tom Guiry as Scott "Scotty" Smalls, new kid in town, who later becomes a left fielder for the Sandlot team.

• David Mickey Evans as adult Scott Smalls (narrator, voice-only, uncredited)

• Arliss Howard as adult Scott Smalls (live action, uncredited)

Mike Vitar as Benjamin Franklin "Benny" Rodriguez, leader of the group, as well as the most dedicated and skilled member of the team.

• Pablo Vitar as adult Benny "The Jet" Rodriguez

Patrick Renna as Hamilton "Ham" Porter, overweight, short-tempered catcher.

Chauncey Leopardi as Michael "Squints" Palledorous, glasses-wearing, snarky centerfielder.

Marty York as Alan "Yeah-Yeah" McClennan, smart-mouthed third baseman.

Brandon Quintin Adams as Kenny DeNunez, easygoing African American pitcher.

Grant Gelt as Bertram Grover Weeks, rebellious second baseman.

Victor DiMattia as Timmy Timmons, hapless first baseman, and Tommy's older brother.

Shane Obedzinski as Tommy "Repeat" Timmons, right fielder, and Timmy's younger brother.

Denis Leary as Bill, Scotty's stepdad

Karen Allen as Scotty's mom

James Earl Jones as Mr. Mertle, former player who now resides near the Sandlot, and owner of "The Beast".

Art LaFleur as Babe Ruth "The Great Bambino", a former famous baseball star player of the New York Yankees who appears in Benny's dream to give wisdom to him on rescuing the prized baseball from "The Beast"

Marley Shelton (credited as Marlee Shelton) as Wendy Peffercorn, lifeguard at the local pool, and target of Squints' crush.

Wil Horneff as Little League team leader Phillips