ST. PETERSBURG, Fla. (AP) -The Tampa Bay Devil Rays designated right-hander Jae Seo for assignment Friday, one of several moves made to revamp the starting rotation.
A pair of starters, left-hander J.P. Howell and right-hander Andy Sonnanstine, were promoted from Triple-A Durham. Reliever Jae Kuk Ryu was optioned to Durham.
Howell, 3-5 with a 3.96 ERA, was recalled to start Sunday's game against Kansas City. He made eight starts with Tampa Bay last season, going 1-3.
Sonnanstine had his contract purchased and will make his major league debut Tuesday at Toronto. He is 40-18 with a 2.56 ERA in 84 career minor league games.
Seo was dropped from the rotation last week, after going 3-4 with an 8.13 ERA in 11 games, including 10 starts. Ryu, 1-1 in 15 relief appearances, will work as a starting pitcher in the minors.
``We saw it all the way through,'' Tampa Bay manager Joe Maddon said. ``We wanted to make sure the guys down below were ready. These two guys were deemed ready and we felt it was necessary to do something at the point.''
Left-hander Jon Switzer was reinstated from the 60-day disabled list and optioned to Durham. He had been sidelined by a left shoulder injury.

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