• UFC 307(10/5/24) Pennington lost a five round split decision to Julianna Peña, losing the UFC women's bantamweight title
• UFC 297(1/20/24) Pennington won a five round unanimous decision over Mayra Bueno Silva to win the UFC women's bantamweight title
• UFC Fight Night(1/14/23) Pennington won a three split decision over Ketlen Vieira
• UFC 273(4/9/22) Pennington won a three round unanimous decision over Aspen Ladd
• UFC Fight Night(12/18/21) Pennington submitted Macy Chiasson via guillotine choke at 3:07 of the second round
• UFC Fight Night(9/18/21) Pennington won a three round unanimous decision over Pannie Kianzad
• UFC on ESPN(6/20/20) Pennington won a three round unanimous decision over Marion Reneau
• UFC 246(1/18/20) Pennington lost a three round unanimous decision to Holly Holm
• UFC on ESPN(7/20/19) Pennington won a three round split decision over Irene Aldana
• UFC Fight Night(11/10/18) Pennington lost a three round unanimous decision to Germaine de Randamie
• UFC 224(5/12/18) Pennington was stopped by Amanda Nunes via strikes at 2:36 of the fifth round in a bout for the UFC women’s bantamweight title
• UFC 205(11/12/16) Pennington won a three round unanimous decision over Miesha Tate
• UFC 202(8/20/16) Pennington won a three round unanimous decision over Elizabeth Phillips
• UFC on FOX(4/16/16) Pennington won a three round split decision over Bethe Correia
• UFC 191(9/5/15) Pennington submitted Jessica Andrade via rear naked choke at 4:58 of the second round
• UFC 184(2/28/15) Pennington lost a three round split decision to Holly Holm
• UFC 181(12/6/14) Pennington submitted Ashlee Evans-Smith via bulldog choke at 4:59 of the first round
• UFC 171(3/15/14) Pennington lost a three round split decision to Jessica Andrade
• TUF 18 Finale(11/30/13) Pennington won a three round unanimous decision over Roxanne Modafferi
• The Ultimate Fighter, Season 18
• On episode 13 (semifinals), Pennington lost a three round unanimous decision to Jessica Rakoczy
• On episode six (quarterfinals), Pennington won a three round decision over Jessamyn Duke
• On episode one, Pennington submitted Tonya Evinger in the second round