A Leading Official
July 29, 2014
For more than a decade, Mark Uyl has been the MHSAA’s leader of service and support to officials. Mark’s calm demeanor and subtle sense of humor have much to do with his successful leadership of what we sometimes call “the complaint department;” but because he has been both, Mark has a good feel for and the respect of both school administrators and officials.
Since joining the MHSAA staff in January of 2004, Mark has continued to referee college football and baseball. Last month Mark worked the NCAA College World Series in Omaha which had been a long-time goal for this still very young man.
This week Mark ascends to chair of the board of directors of the National Association of Sports Officials (NASO).
It’s clear that Mark has as fine a reputation nationwide as he enjoys here in his home state.
Be the Referee: Illegal Substitution/Participation
By
Paige Winne
MHSAA Marketing & Social Media Coordinator
November 11, 2025
Be The Referee is a series of short messages designed to help educate people on the rules of different sports, to help them better understand the art of officiating, and to recruit officials.
Below is this week's segment – Illegal Substitution/Participation - Listen
We’re on the football field this week with 23 players.
Twenty-three is one too many; there should only be 22 on the field at once – 11 on offense, 11 on defense.
But on this play, the offense had a 12th player lined up on the field.
What’s the call?
It depends on when the penalty is spotted.
If the officials catch it before the play is run, that’s an illegal substitution and a 5-yard penalty.
But if the ball is snapped and a play is run with 12 on the field – and the 12th player is not attempting to get off the field – then it’s illegal participation and a 15-yard penalty. It’s also a 15-yard penalty if the offense uses a substitution to create a deception.
Previous 2025-26 editions
Nov. 4: Losing a Shoe - Listen
Oct. 28: Unusual Soccer Goals - Listen
Oct. 21: Field Hockey Penalty Stroke - Listen
Oct. 14: Tennis Double Hit - Listen
Oct. 7: Safety in Football - Listen
Sept. 30: Field Hockey Substitution - Listen
Sept 23: Multiple Contacts in Volleyball - Listen
Sept. 16: Soccer Penalty Kick - Listen
Sept. 9: Forward Fumble - Listen
Sept. 2: Field Hockey Basics - Listen
Aug. 26: Golf Ball Bounces Out - Listen