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The A's wasted no time unloading their third major trade chip, sending utility man Ben Zobrist to the Kansas City Royals on Tuesday for two pitchers, right-hander Aaron Brooks and lefty Sean Manaea.
Oakland recalled infielder Max Muncy from Triple-A Nashville to take the 25-man roster spot vacated by Zobrist, the team announced.
Manaea, 23, was rated the Royals' No. 3 prospect by Baseball America before the season.
He began the year in extended spring training and went a combined 1-1 with a 3.69 ERA in seven starts with the Royals affiliate in the Arizona Rookie League, Single-A Wilmington and Double-A Northwest Arkansas. He struck out 39 batters in 31.2 innings.
Manaea went 7-8 with a 3.11 ERA in 25 starts for Wilmington in his professional debut last year and led the Carolina League with 146 strikeouts.
The 23-year-old left-handed pitcher was selected by the Royals in the Competitive Balance round of the 2013 First-Year Player Draft.
Brooks, 25, has a bit of big league experience but will report to Triple-A Nashville. He's worked mainly as a starter in the minors this season. The A's also sent cash to the Royals along with Zobrist, who will be a free agent after this season and was widely expected to be dealt before Friday's non-waiver trade deadline.
Brooks thanked the Royals on Twitter and commented on his next chapter: "New opportunity with the @Athletics and I couldn't be more stoked!"
Muncy, 24, joins the A’s for the second time this year and is batting .203 with two home runs and six RBI in 34 games. He hit .290 over his first 16 contests but then hit .146 over his final 18 games before being optioned to Nashville June 30.
Muncy is hitting .246 with four home runs and 18 RBI in 37 games with the Sounds.
On Monday, the A's traded closer Tyler Clippard to the Mets. Clippard and Zobrist both were acquired via trade by Oakland in the offseason and were seen as key pieces that could help the A's compete for a fourth consecutive postseason appearance. Instead, the A's have spent the majority of the season in last place, prompting them to sell as the deadline approaches.
The A's began their deadline dealing by sending starter Scott Kazmir to Houston on Thursday. Judging solely by prospect rankings, Manaea would rank as the most highly touted of the five prospects the A's have received in their three trades of the past week.
Oakland A's media services contributed to this report