WASHINGTON — The Philadelphia Phillies recalled left-hander J.A. Happ from Triple-A Lehigh Valley before their game against the Nationals today.

Happ takes the roster spot of struggling right-hander Adam Eaton, who accepted an assignment to the minor leagues Monday.

Happ made two starts for the Phillies earlier this season, with a 3.27 ERA and no decisions. He went 7-6 with a 3.30 ERA in 20 appearances — 19 starts — for Lehigh Valley.

Eaton was 4-8 with a 5.80 ERA in 21 games with Philadelphia this season and was dropped from the starting rotation. He allowed three runs in two innings against Atlanta on Sunday.

Eaton signed a $24.5 million, three-year deal as a free agent before last season.