Mulligan, a top hitter, catcher, infielder and relief pitcher, was a four-year starter at Valencia High School, in California, who had signed with Cal State Fullerton.
"I'm excited. I'm ready to go," Mulligan said. "I didn't get the money I asked for, but it's enough, so I took it. I'll be there."
Mulligan, a four-year starter, has turned down scholarship at California State University, Fullerton.
This past season, the 6-foot-2, 200-pound senior batted .407 with one home run and 21 RBIs, and he set a school season record with eight saves.