The St. Louis Cardinals made a trade with the Seattle Mariners a few hours before their weekend series in Chicago.
The club has acquired outfielder Tyler O'Neill from the Mariners in exchange for left-handed pitcher Marco Gonzales.
O'Neil, taken by the Mariners in the third-round of the 2013 draft, rose to be the club's No. 2 prospect this season after a strong turn in the Arizona Fall League last year that saw him hit .292 with three home runs and 14 RBIs in 19 games.
This season he's played 93 games with the Mariners Triple-A club, and has 19 home runs, 56 RBIs, and nine stolen bases. O'Neill profiles as a power bat, notching 89 homers in three and a half seasons. His career minor league average is a whisper under .270, but his OPS is .849, a solid mark for a a player with his defensive upside.
He will report to Triple-A Memphis and join the Cardinals' loaded outfield prospect list, including standouts Harrison Bader, Adolis Garcia and speedy phenom Magneuris Sierra.
Gonzales, a former Cardinals first-round pick, made waves with his 2014 debut and stellar postseason. In the NLDS and NLCS, he appeared for 5.1 consecutive innings without allowing a run before finally getting tagged by the Giants in Game 4. However he struggled with injury in the years after, being shut down with a shoulder strain and eventually undergoing Tommy John surgery in 2016.
He was never able to find sustained success in the majors, posting a 5.53 ERA in 12 appearances, seven of them starts. He made one start for the Cardinals this season, going just 3.1 innings and allowing five runs.
However, he returned to Triple-A Memphis and went on a tear, winning five straight decisions and posting an ERA of 1.97. His last start before the trade, he allowed four runs in six innings.
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