Jan 23, 2009 2:30 PM EST

New Oakland slugger Matt Holliday has been working out with former Athletics' hitter Mark McGwire in Southern California.

Shortstop Bobby Crosby has joined them in the workouts as well.

"From what I've seen, it's a drastic difference," Holliday said of Crosby, whose offensive numbers have dropped in recent years. "The ball is coming off his bat well. He looks great to me, I think it's helped him a lot. and it looks like he's getting confidence. From the first day to now, he looks a lot different."

Holliday said he feels he's getting a lot out of the sessions because of McGwire's knowledge of hitting mechanics.

Via San Francisco Chronicle