Eric Longenhagen, FanGraphs' prospect writer, has a look at a few A's prospects (among others) in extended spring training, most notably Dakota Chalmers, last year's third-round pick. Longenhagen saw him show off mid-rotation stuff, though as you'd expect from a player this young, his command isn't anything close to major league–ready, and even long term, his size/stamina may make him a reliever.