2008-09: Beau Schmitz joined the OHL's Plymouth Whalers after skating for the U-17 team at the US National Team Development program in 2007-08. In 66 games for the Whalers as a 17-year-old he led all Whalers defensemen with 31 assists and was third on the team with 97 penalty minutes. Schmitz finished the season plus-three and scored 6 goals. Plymouth was third in the West Division and reached the second round in the playoffs. Schmitz was minus-four with 2 goals, 2 assists and 14 penalty minutes in 11 playoff games. He was ranked 195th amongst North American skaters in Central Scouting's final rankings but was not selected in the 2009 NHL Draft.
2009-10: Schmitz was one of two players to skate in all 68 games for Plymouth in his second season along with Carolina third round draft pick Austin Levi. He scored 8 goals with 22 assists and was plus-ten with 97 penalty minutes. Plymouth finished second in the West Division behind OHL and Memorial Cup champion Windsor. Schmitz had 2 assists and was plus-four with 10 penalty minutes in nine playoff games as the Whalers reached the second round.
2010-11: Schmitz was named captain of the Whalers in his third season. He skated in 48 games for Plymouth, missing 20 games after a thumb injury in January that required surgery. He scored 7 goals with 24 assists and was plus-8 with 65 penalty minutes; scoring three of his seven goals on the power play. After finishing third in the West Division, Plymouth reached the second round. Schmitz scored 2 goals with 5 assists and was minus-three with 18 penalty minutes in 11 playoff games.
2011-12: Schmitz attended Carolina's development camp before returning to Plymouth for his fourth season. He skated in 62 games for the Whalers; scoring 14 goals with a career-high 40 assists and was plus-37 with 91 penalty minutes. Plymouth finished first in the West Division. After missing the first round of the playoffs due to a knee injury, Schmitz returned for the Whalers seven-game second-round series with Kitchener and was minus-four with no points and six penalty minutes. He signed a three-year entry-level contract by the Hurricanes in April, 2012.
Likely to play most of the 2012-13 season in the ECHL, but could see time with the AHL's Charlotte Checkers.