https://en.wikipedia.org/wiki/Onside_kick

The kick must be a free kick (a kickoff, or free kick after a safety; in high school football, but not the NFL, the rare fair catch kick can also ... too, with a 2009 rule change that states that "the kicking ...

https://operations.nfl.com/the-rules/2018-rules-changes-and-points-of-emphasis/

On an onside kick, the kicking team may not block in the first 10 yards. The ball is dead if it is not touched by the receiving team and touches the ground in the ...

https://www.sportingcharts.com/dictionary/nfl/onside-kick.aspx

Onside Kick - An attempt by the team that is kicking off to kick the footballso that they can recover it. ... it is a penalty and the receiving team gains possession of the football. ... NFL Picks Using the Golden Rules: Super Bowl Over/Under Edition.

https://www.usatoday.com/story/sports/ftw/2018/09/10/the-nfls-new-kickoff-rules-have-made-onside-kicks-impossible/111299536/

Sep 10, 2018 ... The NFL's new kickoff rules have made onside kicks impossible ... The NFL introduced new provisions to help make football's most dangerous ...

https://www.theringer.com/nfl/2018/11/9/18077538/onside-kick-rules-change-strategy

Nov 9, 2018 ... Did new NFL rule changes eliminate the onside kick? ... safety initiative to reduce injuries on kickoffs, which data have revealed to be football's ...

http://profootballtalk.nbcsports.com/2019/02/09/aafs-substitute-for-kickoff-onside-kick-should-attract-nfls-attention/

Feb 9, 2019 ... As far as the Alliance of American Football is concerned. And at a time ... AAF has stupid onside kick and overtime rules. College and AAF ...

https://www.quora.com/What-are-the-rules-for-the-onside-kick-in-professional-football-NFL

The kicking team is under no obligation to announce that they are going to attempt an onside kick. In many cases, the intent is obvious, based ...

https://www.washingtonpost.com/sports/2019/01/16/onside-kicks-have-become-almost-impossible-convert-will-nfl-make-change/

Jan 16, 2019 ... The onside kick long has been one of the NFL's more captivating plays. ... been taken out of the NFL as one side effect of rules put in place this ...

http://dearsportsfan.com/2015/09/28/how-does-an-onside-kick-work-in-football/

Sep 28, 2015 ... An onside kick is a tactical choice a team makes on a kickoff when ... it as a tactic, not a special type of play that has special rules. ... The kicking team only successfully regained the ball on only 36% of attempts in the NFL in ...

http://www.espn.com/nfl/story/_/id/26299473/how-nfl-save-onside-kick

Mar 19, 2019 ... The NFL's football operations department recently publicized an internal study that ... Have kickoff rule modifications impacted onside kicks?