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Athletics release Santiago Casilla

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Susan Slusser of the San Francisco Chronicle reports that the Athletics have released reliever Santiago Casilla. The club had designated him for assignment on Saturday.

Casilla, 37, posted a 3.16 ERA with 22 strikeouts and 20 walks in 31 1/3 innings of relief for the A’s in the first half. The ERA is certainly not bad, but the strikeout and walk rates are subpar and point to a pitcher who won’t be successful going forward without changing. Additionally, Casilla’s fastball velocity, at 92.9 MPH on average, is the lowest of his career.

Casilla is owed the remainder of his $5.5 million salary for the 2018 season. If he should sign elsewhere, the A’s would be on the hook for the remainder minus the prorated major league minimum salary.

Roberto Osuna to be the Astros new closer

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When the Astros acquired suspended reliever Roberto Osuna it was viewed as a low-price move to bolster their bullpen. Now, it turns out, it was a move to get a closer. Manager A.J. Hinch said as much today, anyway, telling MLB Network Radio that Osuna is going to get most of Houston’s save chances going forward.

This comes the morning after a late innings loss to the Mariners. The closer who Osuna is going to take over for — Hector Rondon — didn’t even pitch in that game, with the damage coming on a three-run Robinson Cano homer off of Collin McHugh. Rondon has blown saves in two of his last three appearances, however, coughing up runs against the Mariners at home on August 12 and against the A’s this past Friday.

Osuna has made five appearances since joining the Astros, allowing one run, striking out three and walking one in five innings of work. Before that he saved nine games for the Blue Jays prior to his domestic violence suspension.