Meredith is the second Nittany Lion to leave the program this offseason, joining Michael Beard.
Taylor is partnering with sports merchandise company FOCO to produce the company's first-ever Olympic Wrestling collectible bobbleheads.
Nickal is 2-0 so far in his amateur MMA career.
Penn State's two-time national champion at 133 pounds is coming back for more.
"With graduating this spring and having a pretty serious back injury recently, I have decided to step away from the sport of wrestling," Edsell said.
Beard's role with Penn State lessened when Max Dean transferred in from Cornell and ultimately won the 197-pound national title.