Mark Ellis was hurt in Monday's game and Weeks pulled from a AAA game and promoted to the Athletics. I'm not sure the extent of Elli's hamstring injury but I suspect if Weeks plays well it may be his position to lose. As we all know Weeks biggest challenge has been staying healthy, something he's done this year with the exception of missing a few days with a minor injury. I like his combination of plate discipline, speed and ok pop for a middle infielder.
I've always liked Weeks — in my fantasy league, a very deep A.L. auction keeper league, I picked him up in our reserve draft before the 2010 season, included him in a trade that netted me Mitch Moreland and Colby Lewis, then picked him up in the 2011 reserve draft with my 5th pick, the 59th pick overall (not all our reserve picks are rookie-eligible; I haven't checked but I would guess Weeks was somewhere between the 20th and 30th minor leaguer taken in the reserve auction, noting that about another 25 minor leaguers were carryovers as keepers from the previous season).
Weeks, 24, entered Monday's action batting .321/.414/.446 with three homers, 22 RBI and nine stolen bases over his first 44 games with Triple-A Sacramento this season. He had 28 BB and 32 Ks. With his plate discipline and bit of extra-base power I expect him to hit for a decent average; if he can keep pace for 25-30 steals over a full season, that makes him a good value for deeper leagues. As he develops I could see him hitting 15 or so home runs, which would make him a more valuable fantasy commodity.