When UFC lightweight Anthony Pettis was forced out of an August 3 fight with featherweight king Jose Aldo due to injury he quickly turned his attention to action later in the month against 155-pound champion Benson Henderson. Though Henderson was already scheduled to square off against T.J. Grant, Pettis still lobbied for the opportunity based on the attached event taking place in his hometown of Milwaukee and the date providing him with enough time to recover from his torn meniscus.

“Showtime” was initially shot down by UFC President Dana White who felt he’d be rushing back to the Octagon before fully healed. However, the Mixed Martial Arts landscape is constantly evolving, and it turns out “Showtime” has been tabbed to take on Henderson after all.

According to UFC officials, Grant went down in training and has been replaced by the 26-year old. Though no specifics were initially offered on Grant’s condition, the former top contender went on Twitter to state he’d suffered a concussion while grappling in the gym.

Pettis is 16-2 in his career including a 2010 win over Henderson during their WEC days. He is currently on a three-fight winning streak with finishes of Joe Lauzon and Donald Cerrone in the bunch.

The 19-2 Henderson is unbeaten in seven Octagon outings. Among the notable opponents he’s had his hand raised against are the likes of Clay Guida, Frankie Edgar, Nate Diaz, and Gilbert Melendez.

UFC 164 is scheduled for August 31. Other bouts on tap include Erik Koch-Dustin Poirier and Frank Mir-Josh Barnett.