Ruiz was outrighted to Triple-A Las Vegas on Thursday, John Shea of the San Francisco Chronicle reports.

EDGE Analysis

The right-hander finished the season in the majors but won't stick on the 40-man roster through the offseason. Ruiz appeared in 14 games out of the bullpen last season and had a 7.11 ERA, 1.95 WHIP and 18:7 K:BB over 19 innings.

Ruiz (0-1) was charged with the loss and a blown save Thursday against the Nationals, allowing four runs (three earned) on two hits and a walk over two-thirds of an inning. He struck out one.

EDGE Analysis

Handed a 5-3 lead when he entered in the 10th inning, Ruiz ultimately surrendered a game-winning three-run home run to Joey Meneses after conceding an RBI single to Keibert Ruiz earlier in the frame. It was the latest big-league debacle for the Athletics' rookie reliever, who's now allowed at least three earned runs in three of his first four appearances with Oakland since making his debut Aug. 19.

Ruiz was recalled from Triple-A Las Vegas on Wednesday.

EDGE Analysis

Ruiz was sent down by Oakland late last week, but he'll rejoin the Athletics' bullpen following a brief stint in the minors. Over his first three major-league appearances, he's given up seven runs on 15 hits and a walk while striking out nine in six innings.

Ruiz was optioned to Triple-A Las Vegas on Friday.

EDGE Analysis

Ruiz spent the last week in Oakland's bullpen but gave up seven runs (five earned) on 14 hits and a walk while striking out nine in six innings over three appearances. The right-hander will head back to the minors after Jared Koenig was recalled by the Athletics on Friday.