The Cal receiver had quite a college debut with four catches for 120 yards, and a touchdown. He ran three times for 38 yards and a score.
"It was real exciting, I feel I made a couple of plays that were beneficial to the team, I felt like I helped out a lot, made a role and did pretty good," says Allen.
Allen's teammates were not surprised with his performance.
"Everybody said they saw it in camp, you could just tell how fluid an athlete he is with the ball. You knew he was going to do something special, which he did, and people were going to get excited, which is just good for our fans," says Cal quarterback Kevin Riley.
Granted the Bears were playing U.C. Davis, but Allen adds another dimension to the Cal offense, which will keep opponents honest.
"When you have a receiver who can make big plays, it opens everything up for the run game, opens up everything for the entire offense because you have to look out for No. 21," says Cal running back Shane Vereen.
Allen knows big plays and the playbook.
"Any time you have a freshman, a true freshman, after just one camp... he didn't make any mental mistakes the other day, which is very unusual for a true freshman," says Cal head coach Jeff Tedford.
Cal will host a Division I team in Colorado on Saturday and now that they have some game tape on Allen, they may be a bit tougher on this true freshman.
