LA JOLLA, Calif. (Interstat) — UC San Diego defeated Cal State Fullerton 10-9 on Friday in a Big West slugfest at Triton Baseball Field, rallying from an early deficit and winning in the 10th inning on a walk-off double.

The Tritons trailed 3-0 after two innings but erupted for seven runs in the third, highlighted by Thomas Maher’s three-run double. Anthony Potestio and Gabe Camacho each homered. Cal State Fullerton answered with four runs in the eighth, including Andrew Kirchner’s three-run homer and Max Ortega’s solo shot, to take a 9-7 lead. The Tritons tied it in the sixth on Camacho’s two-run homer.

In the 10th, Jacob Widelski doubled to right center to score the winning run.

Cameron Kim led the Titans with two hits and three RBIs. Niccolas Gregson and Chapman Weber combined for 3 2/3 scoreless innings of relief for UCSD. Cal State Fullerton fell to 21-29 and UC San Diego improved to 24-25.