Mark Ellis has played 46 games at second base.
He'd be talked about as an all-star if he hadn't missed games because of an injured calf. Ellis is one of the more under-appreciated players in baseball.
He can hit for a solid average, provides some pop, and on occasion he'll steal a base.
So far in the 46 games he's batting .286 with two homers, 19 RBI's, three stolen bases, and seven doubles.
Defensively Ellis has not made an error all season.
Adam Rosales spent a bulk of the time playing second for the A's and impressed A's fans with his hustle and big arm.
For a second basemen Rosales is tall at 6'3. That allows him to be the utility guy for the A's because he's seen time also at first base, third base, shortstop, and left field.
Rosales has seen the most time at second base due to the injury to Ellis. He hit a respectable .255 in the 44 games at second base, hit two home runs, driven in 17, and has seven doubles.
Defensively, like Ellis, Rosales has not made an error at second base. When you combine their numbers at second base Ellis and Rosales have combined for four home runs, 36 RBI, three stolen bases, 14 doubles, and again no errors.