CINCINNATI -- Brad Redford sank both ends of a bonus free throw situation with 37.1 seconds left and Xavier held on for a 61-59 win over pesky Robert Morris on Saturday.
Redford, previously scoreless for the game, was fouled by Lucky Jones after a ball fake in the corner and made both free throws. The Colonials (1-3) called two timeouts after regaining possession, but Karvel Anderson missed a 3-pointer from the left wing with 12 seconds left.
Freshman Semaj Christon, who set Xavier's single-game freshman assist record with eight in the Musketeers' 62-47 win over Butler on Tuesday, finished with 12 and a team-high six assists in just his second career game and first start. Christon missed Xavier's opener while recovering from an infection.
Martin, who scored a combined 21 points in Xavier's first two games, was 6 of 9 from the field, including a career-high four 3-pointers in six tries.
The Musketeers overcame a season-high 15 turnovers to go 3-0 for the fifth straight season and improved to 4-0 in their series against Robert Morris (1-3).
Anderson led the upset-minded Colonials with a career-high 17 points. Velton Jones added 15 for Robert Morris.
Xavier led by as many as eight points, 43-35, on a Jeff Robinson dunk with 15:48 left in the game, but the Colonials came back to tie the score twice in the final 3:49, the second at 59-59 on a jumper by Velton Jones with 1:51 left in the game.
The Colonials, who made just 16 of 70 3-pointers over their first three games, sank their first five and 6 of 9 in the first half, and led 19-17 with 12:28 left before halftime. Xavier countered by shooting a sizzling 65 percent (13 of 20) from the field to lead by as many as seven, 26-19, with 8:31 left before settling for a 36-31 halftime advantage on Davis's 3-pointer with 1 second left.
The Musketeers never trailed after Christon's driving layup gave them a 21-19 lead with 11:01 left in the first half.
Maryland point guard Melo Trimble, considered a lock to leave the program before struggling in the second half last season, has withdrawn from the NBA draft and will return for his junior season.
Louisville's Chinanu Onuaku, who recently underwent a medical procedure to correct a heart rhythm issue detected during the combine, will keep his name in the NBA draft pool.
Andrew White III will return to the Nebraska men's basketball team next season after removing his name from the NBA draft.