He has been a member of the Kansas City Renegades, Oklahoma Defenders, Salina Bombers and Philadelphia Soul.
[3] The Bearcats advanced to the NCAA Division II Football Championship each year of Frevert's college career but lost all four times.
[14] Frevert signed with the Kansas City Renegades of the Champions Professional Indoor Football League (CPIFL) on March 28, 2013, and played for the team during the 2013 season, converting 31 of 35 extra points and 5 of 16 field goals.
[19][20] He was named the CPIFL Special Teams Player of the Week for Week 6 after converting five of five field goals and eight of eight extra points in a 73–61 win over the Lincoln Haymakers, setting a league record for most points by a kicker with 23 and tying a league record with five field goals.
[21][22][23] Frevert signed with the Salina Bombers of Champions Indoor Football (CIF) for the 2015 season.
[35] In the American Conference Championship Game against the Jacksonville Sharks, he recovered a kickoff off the rebound net, converted seven of seven extra points, and had two successful onside kick attempts.