John Joseph Klein: Everything you need to know

The Twins optioned Klein to Triple-A St. Paul on Sunday. The right-hander was called up Saturday by Minnesota and will return to St. Paul after firing two scoreless frames against Pittsburgh. Across his two stints in the majors this year, Klein has given up two earned runs with 2:4 K:BB in three appearances (4.1 innings).

The Twins recalled Klein from Triple-A St. Paul on Saturday. Klein has conceded two earned runs in just 2.1 innings with the Twins this season, but since being optioned to Triple-A on May 7, he's posted a 3.65 ERA and 0.89 WHIP with a 16:5 K:BB across 12.1 innings. Now back with the big club, he'll presumably work in a multi-inning role out of the bullpen, replacing Simeon Woods Richardson, who was DFA'd in a corresponding move.

The Twins optioned Klein to Triple-A St. Paul on Thursday, Betsy Helfand of the St. Paul Pioneer Press reports. The move comes in order to make room for Yoendrys Gomez, who was acquired by the Twins from the Rays on Wednesday. Klein made one appearance up with the big club on Saturday, in which he tossed a perfect inning against the Blue Jays.