SURPRISE, Ariz. -- Three left-handed pitchers were assigned to Minor League clubs on Tuesday by the Royals.
John Lamb, ranked fifth among Royals prospects by MLB.com, was sent to Double-A Northwest Arkansas. Chris Dwyer, ranked 16th, and Justin Marks went to Triple-A Omaha.
"They're all making great strides forward," manager Ned Yost said. "They've shown enough. We like the progress these kids have made, but it's time to get them built up for their season."
Lamb, 22, missed most of the last two seasons after undergoing Tommy John surgery. He pitched six games last year at the rookie level. In the Cactus League this year, he worked two innings and gave up five hits and one run.
"He's right on schedule," Yost said. "Generally, at the end of this year, he's going to be as strong or stronger than he was before he hurt his arm -- right back on track."
Dwyer, 24, was 3-4 with a 6.97 ERA in nine starts last year for Omaha after starting the year in Double-A. He pitched in just one Cactus League game, giving up two runs in 1 2/3 innings.
Marks, 25, spent most of last season with Northwest Arkansas, going 3-5 with a 3.80 ERA in 17 starts. In three Cactus League games, he pitched four innings and had a 2.25 ERA.
Dick Kaegel is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.