Sheppard will use his last remaining year of eligibility with the Terps.
Harbor attended Maryland men's basketball's game against Illinois in College Park.
The wide receiver finished with 152 yards and a touchdown on his Senior Day against Rutgers.
The Terps made back-to-back bowl games for the first time since 2013 and 2014.
Quarterback Taulia Tagovailoa was named to the coach’s All-Big Ten second team.
The Terps also picked up a commit in football and two in baseball.
The Terps notched their first Big Ten shutout since joining the conference in their regular season finale.
Tagovailoa’s 50th passing touchdown as a Terp set the program record, a mark that he previously held alongside Scott Milanovich.
The Terps aim to reestablish offensive success they found early in the season and saw a glimpse of against Ohio State.
Tagovailoa threw for 293 yards and racked up three total touchdowns in the loss.