In the interview, EK talks about all team equipment being custom built from scans of the players: pads, shoes, jerseys, helmets.... I'm sure it's not an off-the-shelf 10.5. At OSU, perhaps JSN has wide feet that resulted in standard 12s being more comfortable. ...or a couple long toes. ...or whatever. Now, Seahawks use a 10.5 base and then alter length/width/depth... according to individual player scan. It's a one-of-a-kind fit.
Perhaps the "good luck" of a healthy 2025 season isn't as much luck as one might think.