"He's one of those guys we're going to have to hold back. He's real enthusiastic," A's manager Bob Melvin said. "Got a little bit tired at the end, and that's what we want to push him to do. He threw quite a bit before he threw off a mound."
Alvarez will continue throwing bullpen sessions every couple of days and, barring any setbacks, could be facing hitters in Minor League games come April.
The 2014 All-Star pitcher, still just 25, has the potential to help create a formidable 1-2 punch with ace Sonny Gray when healthy.
A's infield prospect Rangel Ravelo drove in the only two runs of Monday's intrasquad game at Fitch Park with a single off lefty Dillon Overton. … Another highly regarded infield prospect, Matt Chapman, made a fantastic diving play at third base in the game, warranting praise from Melvin. … Catcher Josh Phegley, one of several players in camp slowed by a flu bug, returned to workouts Monday but did not participate in the intrasquad game. … Rich Hill, Chris Bassitt and Raul Alcantara are all expected to pitch in Tuesday's intrasquad matchup.
Jane Lee is a reporter for MLB.com. Follow her on Twitter @JaneMLB. This story was not subject to the approval of Major League Baseball or its clubs.