Amidst allegations of player mistreatment and an internal investigation, Wichita State Shockers head coach Gregg Marshall submitted his resignation on Tuesday, according to The Wichita Eagle’s Taylor Eldridge, who confirmed the news with Director of Athletics Darron Boatright.

“This was a difficult decision, but one I feel was necessary for my family, the university and, most importantly, the student-athletes,” Marshall said in a statement, via KSN-TV.

“I remain grateful for my years spent at Wichita State. I wish to thank the coaches, student-athletes, the university, the community, and all of Shocker Nation for their unending dedication, support, and loyalty.

“I am incredibly proud of this men’s basketball program and all it has achieved over the past 14 years and am confident of its continued success.”

Per The Athletic’s Nicole Auerbach, the University agreed to a contact settlement with Marshall, which will pay him $7.75 million over six years.

In his 13 seasons at the helm, the 57-year-old Greenwood, South Carolina native guided the program to a 331-121 record and seven National Collegiate Athletic Association (NCAA) Tournament appearances, including a berth in the 2013 Final Four.

Isaac Brown, who spent the last six years as an assistant on Marshall’s staff, will serve as the interim head coach.

Wichita State is scheduled to open their 2020-21 campaign against the Utah State Aggies in the Bad Boy Mowers Crossover Classic in Sioux Falls, South Dakota on Wednesday, November 25 at 9:30 p.m. ET on ESPN2.