They’re playing it safe. At their annual spring meeting, team owners gave temporary approval to new rules in a bid to make kickoffs less dangerous. Changes include eliminating two-man wedge blocks and banning running starts for kickoff coverage teams. Though concussions dropped sharply after 2016, medical data still showed that concussions were five times more likely to occur during kickoff plays. The new rules will be reviewed after the 2018 season and if the number of injuries hasn’t fallen enough, kickoffs could be eliminated entirely in 2019.