Ruiz was born to an African-American mother and a father of Puerto Rican & Dominican descent and grew up in Camden, New Jersey.

[4] Rated a four-star recruit and the top center in his class nationally, Ruiz committed to play college football at Michigan over offers from Florida, Auburn, LSU, and several other top-level programs.

[7][8] Ruiz started all 13 of Michigan's games at center as a sophomore and was named third-team All-Big Ten Conference by the league's coaches and was an honorable mention selection by the media.

[18] Ruiz made his NFL debut on September 21, 2020, on Monday Night Football against the Las Vegas Raiders, playing on six snaps at right guard.

[21] The next day, it was revealed that Ruiz had suffered a Lisfranc fracture during the team's final offensive possession in Week 15 against the Atlanta Falcons.