Mark Borowiecki (pronounced BOR-vee-ETZ-kee; born July 12, 1989) is a Canadian former professional ice hockey defenceman.

Borowiecki played three seasons with the Golden Knights team in the Eastern Collegiate Athletic Conference, scoring 12 goals and 20 assists.

[9] On October 23, 2018, Borowiecki elbowed Boston Bruins' defenceman Urho Vaakanainen during a scrum in the Senators' crease.

[10] In his first game back on October 28 against the Vegas Golden Knights, Borowiecki delivered an illegal hit to the head of Cody Eakin.

[13] On June 1, Borowiecki released a statement on his Instagram account about dealing with problems with his mental health and concussions.

[15] On April 11, 2022, Evgeni Malkin of the Pittsburgh Penguins was suspended for four games after delivering an illegal cross-check to Borowiecki's face.

[16] On October 22, 2022, Borowiecki was seriously hurt in an awkward collision along the boards with Morgan Frost in a game versus the Philadelphia Flyers.

[21] In a December 2019 off-ice incident in Vancouver, British Columbia, Borowiecki prevented a theft, and attempted a citizen's arrest, earning him the nickname 'Boro Cop.