The A's will explore ways of upgrading their roster this season, but the youngest members of their rotation are 'basically untouchable,' according to ESPN.com's Buster Olney (on Twitter). Brett Anderson, Trevor Cahill, Gio Gonzalez and Tyson Ross are likely staying put this summer, Olney reports.
Dallas Braden, now on the 15-day DL and Brandon McCarthy round out Oakland's rotation, which could be a constant for years to come. The A's have Anderson and Cahill under team control through 2015 and 2017, respectively. Ross isn't eligible for free agency until after the 2016 season, Gonzalez isn't eligible until after 2015 and Braden is under team control for 2012-13.
A's starters are first in the majors in ERA (2.59), second in innings pitched (236) and third in BB/9 (2.48) and xFIP (3.29). The early results are good and it wouldn't be hard to argue that Gonzalez (25), Ross (24), Cahill (23) and Anderson (23) have yet to reach their prime.