A Long Island native, Lannan struggled through an injury-plagued 2013 season with the Phillies after spending the first six years of his career with the Nationals. The Phillies outrighted Lannan after the season, but he refused his assignment and elected to become a free agent, ultimately signing Saturday's deal with his hometown team.
Lannan's struggles last season started in April with a strained quadriceps tendon in his left knee that forced him to miss two months. He returned on June 17, but made his final start of the season on Aug. 14 before being placed on the disabled list with left-knee tendinosis.
He later elected to have season-ending surgery to repair his recurring knee issues, but Lannan expects to be 100 percent healthy for Spring Training.
Lannan comes into camp with a 45-58 record to go along with a 4.12 ERA over 148 career starts.
Paul Casella is a reporter for MLB.com. Follow him on Twitter @paul_casella. This story was not subject to the approval of Major League Baseball or its clubs.