Jack Nilson, a mixed martial artist, competed in the Ultimate Fighting Championship (UFC) with a record of 2 wins, 6 losses, and 0 draws. His UFC career saw him secure one victory out of two bouts. The specific weight class he competed in is not provided. In terms of performance statistics during his UFC career, Nilson demonstrated an average of zero significant strikes per minute, a striking accuracy of 0%, and a strike defense of 0%. He also averaged no takedowns or submission attempts per 15 minutes. Notable among Nilson's career highlights is his victory over Saeed Hosseini, an opponent with an ELO rating of 1000. His most recent fights include a loss against Tai Bowden via KO/TKO due to headbutts in December 1996 and a win against Saeed Hosseini via KO/TKO due to elbows in May 1997, marking his only UFC victory.