Light, the 37th overall pick in the Draft, went 8-3 with a 2.40 ERA in 14 starts this season as a junior at Monmouth University. His deal is for $1 million, which is below the assigned slot value of $1.394 million.
Boston also reached agreements with right-handers Jamie Callahan (second-round pick), Ty Buttrey (fourth round) and Mike Augliera (fifth round). Buttrey signed for $1.3 million, above the assigned fourth-round value of $291,300.
Catcher Miguel Rodriguez, a 36th-rounder out of UNC Charlotte, was another signee. He is the son of Red Sox Minor League hitting coordinator Victor Rodriguez and the brother of club scout Victor Jr. Miguel made 20 starts behind the plate for Charlotte this year and caught 10 of 22 would-be basestealers.
Additional signings announced on Friday included right-handed pitcher Kyle Kraus (seventh round), first baseman Nathan Minnich (eighth round), infielder Mike Miller (ninth round), left-handed pitcher Dylan Chavez (14th round), center fielder Shaq Thompson (18th round) and first baseman Jake Davies (21st round).