Marlins demote Derek Dietrich because of his defense

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Derek Dietrich has been the Marlins’ starting second baseman since being called up from the minors in the middle of last season and he’s actually hit well this year with a .773 OPS in 41 games, but he’s been demoted back to Triple-A because the team thinks his defense is terrible.

Dietrich has seven errors, which is tied for the MLB lead among second basemen, and Manny Navarro of the Miami Herald writes that he “has had plenty of defensive struggles” even beyond the error total. Ultimate Zone Rating agrees, pegging Dietrich as 9.0 runs below average in 800 career innings at the position.

But still: 24-year-old middle infielders with a .773 OPS don’t grow on trees and Dietrich’s defensive numbers aren’t considerably worse than plenty of other regulars with good bats. He’s a former Rays second-round draft pick who was acquired by the Marlins in exchange for Yunel Escobar and certainly seems good enough to remain in their long-term plans.

Nolan Arenado swats go-ahead homer for 1,000th career hit

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Rockies third baseman Nolan Arenado entered Monday night’s game against the Nationals sitting on 997 hits for his career spanning seven seasons. Arenado hit an RBI double in the first inning, grounded out in the third, doubled again to lead off the fifth, then hit a solo homer to lead off the seventh, breaking a 5-5 tie. The homer, off of Wander Suero, represented the 1,000th career hit for Arenado.

Arenado now has four homers on the season along with 14 RBI, 15 runs scored, and a .281/.337/.483 batting line. He has recovered nicely after a slow start to the season — he had a .610 OPS following an 0-for-4 game against the Giants on April 13.