Mateo, who's slashing .333/.374/.551 with eight doubles, eight triples, two home runs, 24 RBI and eight stolen bases across 29 games with Triple-A Las Vegas, could be the next callup for the Athletics, Martin Gallegos of MLB.com reports. As those numbers imply, the 23-year-old has been tormenting Triple-A arms throughout the season while putting in time at both second base and shortstop. While there have been knocks on Mateo's maturity and focus in the past, the difference between his body of work at the Triple-A level in 2019 compared to last year is stark. Mateo slashed a middling .230/.280/.353 across 510 plate appearances at Nashville last season, and he's already amassed half of the 36 extra-base hits he posted during that tenure in 363 fewer opportunities.
Mateo is slashing .375/.412/.563 across his first 51 plate appearances at Triple-A Las Vegas. It's a small sample, but dynasty owners have to be thrilled at the promising prospect's red-hot start. The impressive line is a well-balanced one as well, as it's comprised of five extra-base hits (two doubles, two triples, one home run), eight RBI, three walks, four stolen bases and 11 runs. Mateo had a rougher go of it in his first exposure to Triple-A arms last season, slashing .230/.280/.353 across 510 plate appearances at Nashville. A 27.3 percent strikeout rate helped lead to those middling numbers, and he's provided some early reason for optimism by whittling that figure to 19.6 percent thus far.
Mateo was optioned to Triple-A Las Vegas on Sunday, Jane Lee of MLB.com reports. Mateo went 5-for-18 with an RBI and three runs scored during his time in major-league camp. He currently ranks as Oakland's No. 4 prospect, although he did struggle at the dish at Triple-A a season ago (.230/.280/.353 batting line through 131 games).
Mateo collected four hits -- including his first two home runs of the season -- before Triple-A Nashville's game against Colorado Springs on Thursday was suspended in the eighth inning, Kelsie Heneghan of MiLB.com reports. Nashville and Colorado Springs won't finish the halted game until Aug. 9, so Mateo's excellent production won't be included on his season stat line until that date. It was easily the best performance of 2018 for Mateo, who had recorded just five hits in 60 at-bats over his prior 15 games to leave his season batting line at .165/.206/.231 through 97 plate appearances. The low on-base percentage has prevented Mateo from regularly putting his premium speed on display, with the shortstop having been limited to four steals (on seven attempts) thus far.
Mateo was optioned to Triple-A Nashville on Tuesday, Jane Lee of MLB.com reports. Mateo had a terrific game Tuesday against the Royals. The 22-year-old went 2-for-4, with both hits being home runs. However, with Jed Lowrie and Marcus Semien at second base and shortstop, respectively, it seemed likely that Mateo would return to the minors before the 2018 season got underway. After logging a .292/.333/.518 line over 30 games at Double-A Midland following his trade from the Yankees last season, Mateo will have his first chance to play at the Triple-A level.