Lester agreed to a minor-league contract with the Royals on Sunday, Anne Rogers of MLB.com reports.
Lester elected to become a free agent Tuesday.
Lester cleared waivers and was outrighted to Triple-A Norfolk on Wednesday, Jake Rill of MLB.com reports.
The Orioles designated Lester for assignment Wednesday, Andy Kostka of TheBaltimoreBanner.com reports.
Lester was optioned to Triple-A Norfolk on Saturday.
The Orioles selected Lester's contract from Triple-A Norfolk on Saturday.
The Orioles reassigned Lester to minor-league camp Monday, Jacob Calvin Meyer of The Baltimore Sun reports.
Lester went 3-for-4 with two triples, one RBI and one run scored in Tuesday's Grapefruit League win over the Pirates.