Warren Central baseball coach Derrick DeWald gets his head shaved by Cooper Jamison before Monday's eighth- and ninth-grade games against Clinton. The Vikings were getting their heads shaved in honor of Jamison, the team manager, who will have surgery later this week to treat a brain tumor. (Ernest Bowker/The Vicksburg Post)

Warren Central baseball player Tristan Jamison gets his head shaved by Angela LaBarre before Monday's eighth- and ninth-grade games against Clinton. The Vikings were getting their heads shaved in honor of team manager Cooper Jamison, who will have surgery later this week to treat a brain tumor. Tristan is Cooper's older brother. (Ernest Bowker/The Vicksburg Post)

Warren Central baseball player Tristan Jamison gets his head shaved by Angela LaBarre before Monday's eighth- and ninth-grade games against Clinton. The Vikings were getting their heads shaved in honor of team manager Cooper Jamison, who will have surgery later this week to treat a brain tumor. Tristan is Cooper's older brother. (Ernest Bowker/The Vicksburg Post)

Warren Central baseball player Noah Oldenburg gets his head shaved by Mary Grace jamison before Monday's eighth- and ninth-grade games against Clinton. The Vikings were getting their heads shaved in honor of team manager Cooper Jamison, who will have surgery later this week to treat a brain tumor. (Ernest Bowker/The Vicksburg Post)

Warren Central baseball players, from left, Landon Hasty, Tristan Jamison, Justin Greer and Braxton Scallions pose for a photo before Monday's freshman team doubleheader against Clinton. (Ernest Bowker/The Vicksburg Post)

Cooper Jamison warms up his arm before Monday's Warren Central freshman baseball doubleheader vs. Clinton. Jamison, who will have surgery later this week to treat a brain tumor, was honored before the game and threw out the first pitch. (Ernest Bowker/The Vicksburg Post)

Warren Central baseball coach Jace Leachmann shows off a wristband with the "#supercooper" logo in honor of Cooper Jamison.. Jamison, who will have surgery later this week to treat a brain tumor, was honored before the game and threw out the first pitch. (Ernest Bowker/The Vicksburg Post)

Cooper Jamison gets the baseball and some tips from Warren Central player Thomas Antwine before throwing out the first pitch for Monday's freshman doubleheader against Clinton. (Ernest Bowker/The Vicksburg Post)

Cooper Jamison sits in the dugout before Monday's Warren Central freshman baseball doubleheader vs. Clinton. Jamison, who will have surgery later this week to treat a brain tumor, was honored before the game and threw out the first pitch. (Ernest Bowker/The Vicksburg Post)

Warren Central baseball players Holt Pownall and Trace Hood hold a signed team photo banner that was given to Cooper Jamison before Monday's freshman game vs. Clinton. Jamison, a team manager, is battling brain cancer. (Ernest Bowker/The Vicksburg Post)

Cooper Jamison passes Warren Central baseball players Holt Pownall and Trace Hood, and assistant principal Crystal Hood, on his way to the mound to throw out the first pitch for Monday's freshman doubleheader against Clinton. (Ernest Bowker/The Vicksburg Post)

Cooper Jamison throws out the first pitch before Monday's Warren Central freshman baseball doubleheader vs. Clinton. Jamison, who will have surgery later this week to treat a brain tumor, was honored at the game. (Ernest Bowker/The Vicksburg Post)

Warren Central's Trace Hood watches a pitch cross the plate during Monday's freshman baseball game against Clinton. (Ernest Bowker/The Vicksburg Post)

Warren Central's Justin Greer takes a lead off first base as Clinton's Ryan Saxton (19) covers the bag during Monday's freshman baseball game at Viking Field. (Ernest Bowker/The Vicksburg Post)

Warren Central's Holt Pownall throws a pitch during Monday's freshman baseball doubleheader against Clinton. (Ernest Bowker/The Vicksburg Post)

Warren Central's Tristan Jamison takes a pitch duing Monday's freshman baseball doubleheader against Clinton. (Ernest Bowker/The Vicksburg Post)

A large crowd watches Monday's freshman baseball doubleheader between Warren Central and Clinton at Viking Field. The game served as both a benefit and tribute for WC team manager Cooper Jamison, who will have surgery this week to treat a brain tumor. (Ernest Bowker/The Vicksburg Post)