What KJ Wright says ??

"I would say, to play the OTTO position and if [Bradley] needs me to play any other positions on nickel to know it and play it at a high level. I’ve prided myself on knowing all three [linebacker] positions, I’ve done them throughout my whole career, started at SAM, MIKE and WILL. So whatever the coach needs me to do on Sundays and Mondays, I’ll be there for him."

For those of us who don't know , please explain what OTTO, SAM, MIKE and WILL mean? Unless it takes to much to explain.