In September 2013, Hubbard won his first PGA Tour Canada event at The Wildfire Invitational. He finished the season ranked third on the Order of Merit, securing him one of five Web.com Tour cards for the 2014 season.[4]
In his first season on the Web.com Tour, Hubbard had six top-10 finishes including a runner-up to Greg Owen at the United Leasing Championship. He finished 18th on the regular-season money list and secured his first PGA Tour card.
During his first season on the PGA Tour, Hubbard made 15 out of 25 cuts but only had a best finish of T20. He lost his card after finishing 164th in the FedEx Cup, but regained it in the Web.com Tour Finals. Hubbard had a better season in 2016, making 21 out of 30 cuts; he finished 115th in the FedEx Cup, retaining his card. In 2017 Hubbard finished 184th in the standings and lost his card, requiring him to go back to the Web.com Tour.
In 2019, Hubbard earned his first win on the Web.com Tour at the LECOM Suncoast Classic,[5] and went on to regain his PGA Tour card by finishing ninth on the regular-season money list.
During the 2022 season, Hubbard showed more consistent form, making 16 cuts in 22 events and posting two top-10s. He retained his card by finishing 100th in the FedEx Cup. In 2023, Hubbard had his best season to date on the PGA Tour. He made the cut in 22 events, with twelve top-25s and six top-10s. Hubbard made the FedEx Cup playoffs and finished 67th in the rankings.[6]
On June 3, 2024 Mark Hubbard shot a 36-hole score of 127 (15-under par) to earn medalist honors at the Cherry Hill Club, Ridgeway, Ontario, Canada U.S. Open sectional qualifier, earning him a spot in the 2024 U.S. Open.
In 2015, Hubbard proposed to his girlfriend of seven years, Meghan, on the 18th green at Pebble Beach, after completing his first round of the AT&T Pebble Beach Pro-Am.[8] They were married in 2017 and now have two daughters.