The Minnesota Twins acquired Sam Dyson from the San Francisco Giants at the trade deadline.
At the time Dyson had a 2.47 ERA and 6.71 strikeout-to-walk ratio. Since joining the Twins, the reliever has a 7.15 ERA and 1.33 strikeout-to-walk ratio in 12 appearances.
Dyson is also expected to miss the remainder of the regular season with a shoulder injury.
The Twins aren't happy and have begun "investigating" whether the Giants knew about Dyson's injured shoulder at the time of the trade.
Dyson reportedly informed the Twins shortly after joining them that he had been pitching with some discomfort, dating to a July 15-17 series against the Colorado Rockies.