He was selected to represent American Samoa at the 1994 Winter Olympics as part of a two-man bobsleigh team alongside brakeman Brad Kiltz. This was the first time American Samoa had sent athletes to a Winter Olympic Games. The pair were managed by William "Buddy" Hoblak. In the first run Muagututia and Kiltz placed 41st out of the 43 sleds in a time of 55.57 seconds. On the second run they were again 41st in a faster time of 55.25 seconds. They improved to 37th position on run three with a time of 55.06 seconds. On the fourth and final run they finished 38th in a time of 55.16 seconds. Overall they finished 39th with a combined time of 3 minutes 31.04 seconds.