Both right-handers were injured shortly before spring training was suspended due to the coronavirus pandemic.
Munoz, 21, made his big league debut last year and appeared in 22 games. He went 1-1 with a 3.91 ERA and 30 strikeouts, against 11 walks. He would have been a key member of the Padres’ beefed-up bullpen this season, if and when it resumes.
The 22-year-old Lawson was 3-1 with a 5.20 ERA in six starts with Double-A Amarillo last season before being shut down with an elbow injury. He returned for the Arizona Fall League, going 1-0 with a 0.82 ERA in three appearances, including two starts.