Nats designate Kelley after mound outburst

Jackson's first Mets home run A day after admittedly "acted like a baby" while pitching the ninth inning of a blowout, 25-4 win over the Mets on Tuesday, Nationals reliever Shawn Kelley was designated for assignment early Wednesday morning.

The move comes as a bit of a surprise, as Kelley has been a key part of the Nationals over the past three seasons and has pitched fairly well this season, posting a 3.34 ERA with 32 strikeouts and five walks in 32 1/2 innings.

View Full Game Coverage

The Nationals promoted right-hander Jimmy Cordero to replace Kelley in the bullpen. Cordero, 26, was 4-1 with a 1.67 ERA in 38 games with Triple-A Syracuse.

Kelley tossed his glove into the grass in front of the…