Brock James Sheahan (born May 6, 1984) is a Canadian professional ice hockey coach and former defenceman who is the head coach of the Notre Dame Fighting Irish of the Big Ten Conference.
Sheahan played his college ice hockey at Notre Dame from 2004 to 2008. He recorded four goals and 29 assists in 161 games. He served as alternate captain his senior year, and helped lead the Irish to the Frozen Four for the first time in program history.
Following his collegiate career, he played four seasons in the East Coast Hockey League (ECHL), one season with the Wheeling Nailers, two seasons with the Cincinnati Cyclones and one with the Ontario Reign.
On August 10, 2014, Sheahan was named an assistant coach for Holy Cross.
Following four years at Holy Cross, he then served as an associate head coach for the Chicago Steel of the United States Hockey League (USHL) for two years. On December 1, 2019, he was promoted to head coach of the Steel, after former head coach Greg Moore left midway through the 2019âÂÂ20 season. He finished the 2019âÂÂ20 with a record of 26âÂÂ3âÂÂ0âÂÂ0, in a season that was shortened due to the COVID-19 pandemic, and led the Steel to the Anderson Cup. He again led the Steel to the Anderson Cup during the 2020âÂÂ21 season, and the Clark Cup in 2021. He finished his career with the Steel as the winningest coach in program history, with a record of 108âÂÂ30âÂÂ12âÂÂ3, including the postseason.
On August 23, 2022, he was named head coach of the Chicago Wolves of the American Hockey League (AHL). During the 2022âÂÂ23 season, he led the Wolves to a 35âÂÂ29âÂÂ5 regular season record.
On June 20, 2023, he was named an associate head coach for Notre Dame. On June 24, 2024, he was named the head coach in waiting for Notre Dame, after longtime head coach Jeff Jackson announced he would retire following the 2024âÂÂ25 season. On March 17, 2025, he was officially named the head coach for Notre Dame.
Sheahan's second cousin, Riley Sheahan, is a former professional ice hockey player.