The Louisville Kings signed offensive lineman Mike McAllister and Keith Russell Jr., linebacker Antonio Grier Jr., and defensive backs Travis Martin and Jordan Polk on Thursday according to the UFL Transactions page.
Mike McAllister is six foot two and weighs 305 pounds. The 26-year-old from Pittsburgh, Pennsylvania, signed with the Los Angeles Rams as an undrafted free agent on May 1, 2023. He spent three seasons in Los Angeles, playing seven preseason games. The Rams released him on August 24, 2025.
Collegiately, McAllister spent five seasons at Youngstown State (2018-22), playing center in 41 games for the Penguins. In 2022, he was named Second Team All-MVFC. Youngstown State averaged 28.6 points per game, 399 yards per game, 196.4 passing yards per game, 202.6 rushing yards, and 38 touchdowns.
Keith Russell Jr. is six foot six and weighs 308 pounds. The 25-year-old from Frisco, Texas, attended the Atlanta Falcons rookie minicamp in 2024. The Panthers signed him on July 23, 2024. In 2025, he played four games.
Michigan averaged 24.5 points per game, 4.5 rushing yards per game, 199.3 passing yards per game, 327.1 total yards per game, and 29 touchdowns, finishing 6-4 for the season and appearing in the 2025 UFL Championship Game.
Collegiately, Russell Jr. played three seasons at Missouri Western State University (2021-23), playing 29 games for the Griffons. He was named a two-time Third Team All-MIAA. In 2023, Missouri Western State’s offense averaged 37.42 points per game, 200.2 rushing yards per game, 218.17 passing yards per game, 418.3 average total yards per game, and 58 touchdowns, finishing 8-4 in the season.
Antonio Grier Jr. is six foot one and weighs 230 pounds. The 26-year-old from Atlanta, Georgia, signed with the Tampa Bay Buccaneers as an undrafted free agent on May 10, 2024. In 2024, he made 17 tackles (9 solos, 8 assists) and two pass breakups in three preseason games. He appeared in seven regular-season games with one tackle (1 solo). In 2025, he made five tackles (2 solos, 3 assists) and one pass breakup in two preseason games. The Buccaneers released him on September 4, 2025.
Collegiately, Grier Jr. spent five seasons at the University of South Florida (2018-22) with 238 tackles (139 solos, 99 assists), 23.5 tackles for loss, 10 sacks, two interceptions for 69 yards, one touchdown, three pass breakups, five forced fumbles, two fumble recoveries, and one kick return for 11 yards in 47 games for the Bulls.
In 2021, he was named Second Team All-AAC, First Team All-AAC by Pro Football Network, and Third Team All-AAC by Athlon after finishing the season with 92 tackles (52 solos, 40 assists), nine tackles for loss, three sacks, two interceptions for 69 yards, one touchdown, two pass breakups, two forced fumbles, and one fumble recovery in 12 games.
Then, he transferred to Arkansas in 2023 with 36 tackles (14 solos, 22 assists), one interception for 25 yards, one touchdown, and one fumble recovery in 11 games for the Razorbacks.
Travis Martin is six foot three and weighs 215 pounds. A native of Kenner, Louisiana, Martin attended the Seattle Seahawks rookie minicamp in 2025.
Collegiately, Martin spent four seasons at Langston University (2021-24) with 69 tackles (47 solos, 22 assists), five tackles for loss, half a sack, 10 interceptions for 85 yards, 23 pass breakups, three fumble recoveries, punting the ball one time for 33 yards, one kick return for -19 yards, and one punt return for nine yards in 31 games for the Lions.
In 2024, he was named First Team All-SAC after finishing the season with 25 tackles (19 solos, 8 assists), three tackles for loss, half a sack, two interceptions, six pass breakups, one fumble recovery, one kick return for -19 yards, and one punt return for nine yards in nine games.
Jordan Polk is five foot one and weighs 189 pounds. The 25-year-old from Arlington, Texas, signed with the New England Patriots as an undrafted free agent on May 9, 2025. In 2025, he made nine tackles (7 solos, 2 assists), one sack, one quarterback hit, and two pass breakups in three preseason games. The Patriots released him on August 22, 2025.
Collegiately, Polk spent three seasons at East Texas A&M University (2021-23) with 72 tackles (39 solos, 33 assists), seven tackles for loss, three sacks, two interceptions for 25 yards, 13 pass breakups, two forced fumbles, and one fumble recovery in 26 games for the Lions.
Then, he transferred to Texas State University in 2024, where he was named an All-Sun Belt Honorable Mention after finishing the season with a career-high 69 tackles (36 solos, 33 assists), 5.5 tackles for loss, two sacks, two pass breakups, four forced fumbles, and one fumble recovery in 13 games for the Bobcats.
