That's beyond irrelevant. Teams will list a starting 5 with 3 guards and 2 forwards. One of those forwards is playing the 5
Last year’s Big Ten starters at the 5 and their listed position. More than half of them are listed as Forwards.
Illinois: Dain Dainja (F) 6’9” 270
Indiana: Trayce Jackson Davis (F) 6’9” 245
Iowa: Filip Rebraca (F) 6’9” 230
Maryland: Julian Reese (F) 6’9 230
Michigan: Hunter Dickinson (C) 7’1” 260
Michigan State: Mady Sissoko (C) 6’9” 240
Minnesota: Joshua Ola Joseph (F) 6’7” 215
Nebraska: Derrick Walker (F) 6’9” 245
Northwestern: Matthew Nicholson (C) 7’0” 255
Ohio State: Zed Key (F) 6’8” 255
Penn State: Kebba Njie (F) 6’10” 237
Purdue: Zach Edey (C) 7’4” 295
Rutgers: Cliff Omoruyi (C) 6’11” 240
Wisconsin: Steven Crowl (F) 7’0” 245”