Via Mychael Urban, the A's are calling up Trevor Cahill to start tomorrow's game against the Blue Jays. Most likely, the A's will send down Steve Tolleson to make room. This is not a huge surprise, but the other pending move is. Apparently catcher Josh Donaldson is on his way up to the big club and will be activated pending Kurt Suzuki's MRI results, but all indications are that Suzuki is on his way to the DL.
Donaldson, 24, was acquired in the 2008 Rich Harden deal and has hit well since his acquisition --- a .330/.391/.564 line in high-A in 2008 and a .270/.379/.415 line in AA in 2009. This year at Sacramento he's at .269/.320/.522, showing decent patience and good pop so far. PECOTA projects him to post a .239/.321/.388 in the majors this year, which isn't horrible for a catcher. His reputation puts him as a league-average defender, and he's certainly looks like a solid backup to Suzuki in the future.
Zack wrote about him in the Six-Year Outlook on catchers, so check that out for more information.