2022-2023: Rennhack grabbed eight top-5 finishes on the season. He swam six season-best times during the South Atlantic Conference Championships. Rennhack placed second in the 100-yard butterfly in 52.71 against Mars Hill on Senior Night and finished in second in both the 200-yard backstroke (2:00.91) and 200-yard IM (2:04.24) against Emory & Henry. 

2021-2022: Placed 8th in the 100-yard backstroke with a time of 51.07 at the Bluegrass Mountain Conference Championships. Personal best against Lees-McRae in the 200-yard freestyle with a time of 1:47.83 where Rennhack placed 2nd. Placed 2nd against Tennessee in the 200-yard backstroke at 1:54.62 and 4th in the 100-yard backstroke at 51.35. 

High School: Named team captain in 2020-21 as well as being named the team MVP all four years as a Panther. Rennhack finished as a top-10 finisher at state two years in a row. Named regional champion during his sophomore and junior year. 

Personal: Son of Regina and Dave Rennhack. Intends to major in business marketing at Carson-Newman. Dad, Dave, played college golf and is a professional golfer.