Many football rules changes start with the NFL and trickle down to college football. Here are the changes that various NFL clubs have proposed this year:

By Kansas City; to amend Rule 16 to (1) allow both teams the opportunity to possess the ball at least one time in overtime, even if the first team to possess the ball in overtime scores a touchdown; (2) eliminate overtime for preseason; and (3) eliminate overtime coin toss so that winner of initial coin toss to begin game may choose whether to kick or receive, or which goal to defend.
By Denver; to amend Rule 6, Section 1, Article 1 to provide an alternative to the onside kick that would allow a team who is trailing in the game an opportunity to maintain possession of the ball after scoring.
By Washington; to amend Rule 15, Section 2 to subject all plays that occur during a game to coaches’ challenge by teams or review by the Officiating department in the instant replay system.
By Washington; to amend Rule 15, Section 2, Article 5 to add review of personal fouls as reviewable plays in the instant replay system.
By Kansas City; to amend Rule 15, Section 2, to add review of personal fouls (called or not called on the field) as plays subject to coaches’ challenge in the instant replay system.
By Carolina, Los Angeles Rams, Philadelphia and Seattle; to amend Rule 15, Section 2, to add review of designated player safety-related fouls (called or not called on the field) as plays subject to coaches’ challenge in the instant replay system.
By Philadelphia; to amend Rule 15, Section 2, to add scoring plays and turnovers negated by a foul to be subject to automatic review in the instant replay system.
By Denver; to amend Rule 15, Section 2, to add all fourth down plays that are spotted short of the line to gain or goal line to be subject to automatic review in the instant replay system.
By Denver; to amend Rule 15, Section 2, to add all Try attempts (Extra point or Two-point conversion) to be subject to automatic review in the instant replay system.

2019 CLUB PLAYING RULES PROPOSALS