Ferguson was optioned to Triple-A Las Vegas on Friday.
Ferguson appeared in nine games with the Athletics, tallying a 4.50 ERA over 10 innings. However, he'll be pushed back to the Triple-A level, while Dany Jimenez and Brady Basso join the big-league roster.
Ferguson (0-1) was charged with the loss against the Rays in extra innings Thursday, allowing an unearned run across 1.1 hitless innings. He struck out one.
Ferguson entered the game in the 11th with the score knotted at 5-5 and retired the side in order before returning for the 12th and inducing an inning-opening groundout that moved phantom runner Jose Caballero to third base. T.J. McFarland subsequently allowed Caballero to cross the plate on Richie Palacios' walk-off single, saddling Ferguson with the loss. The right-hander did at least bounce back from a rocky outing Wednesday, one that had seen him allow a run on three hits over two-thirds of an inning. Ferguson is likely to continue seeing work primarily in lower-leverage scenarios, and he holds a 4.50 ERA and 1.40 WHIP over his nine appearances this season.
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Athletics' Tyler Ferguson: Contract selected by Oakland
Rotowire
The Athletics selected Ferguson's contract from Triple-A Las Vegas on Tuesday.
The right-hander joined Oakland on a minor-league deal in November and will now receive his first taste of the big leagues. Ferguson started strong at Triple-A this season with a 2.40 ERA, 1.27 WHIP and 24:5 K:BB across 15 innings.
