The Pro Football Hall of Fame will expand the number of potential inductees to 20 in 2020 as part of the NFL's celebration of its 100th season.

Calling it a centennial class, Hall of Fame President David Baker said Friday in Canton that five modern-day players, 10 seniors, three contributors and two coaches could be elected next year. The modern-day group would be decided by the 48 selection committee voters, as always, on the day before the Super Bowl in February.

The other 15 would be voted on as one bloc, not individually, by the selection committee. They would be chosen by a 25-member committee that will include Hall of Famers, historians and current voters.

Part of the 2020 class would be inducted in early August. The others would be enshrined about Sept. 17, 2020, the date that marks 100 years from the original NFL game.

Baker did not identify the specific members of the 25-person committee, nor the exact voting procedures. Through the years, 80% positive votes have been required for election.

He joked that with so many potential inductees next year — the current maximum is eight — there will be "a lot of doors to knock on" with the good news.

"This is good for football, for the Pro Football Hall of Fame and it is great for the NFL," he said. "We get a way to celebrate 100 years and look forward to the next 100 years."

Eagles sign safety

The Philadelphia Eagles signed safety Johnathan Cyprien and released safety Godwin Igwebuike.

Cyprien, a second-round pick in 2013, has started 70 games for the Jaguars and Titans. He missed last season after tearing his ACL.

Cyprien gives the Eagles more veteran depth. Rodney McLeod is returning from knee surgery to play alongside Malcolm Jenkins. The Eagles already signed former Vikings safety Andrew Sendejo and they have Tre Sullivan, Blake Countess, Deiondre' Hall and Trae Elston on the roster.

Cyprien has two interceptions, four forced fumbles, two fumble recoveries and three sacks in his career.

Rookie injured

Jacksonville Jaguars rookie tight end Josh Oliver has a "significant" hamstring injury that could cause him to miss the regular-season opener.

A third-round draft pick from San Jose State, Oliver strained his right hamstring during practice Thursday. Tests later revealed the extent of the damage.

"These hamstring things, is it a serious one? It is," coach Doug Marrone said Friday. "I don't know how he heals. I don't know how he'll react to it. I'd like to be able to get him back, but we'll prepare and get everyone else reps."

The Jaguars are counting on the 6-foot-5 Oliver to bolster the passing game, hoping he creates mismatches for defenses and gives new quarterback Nick Foles a bigger target near the end zone.

Cornerback returns

Darius Slay was activated from the active/nonfootball injury list before the Detroit Lions' practice Friday night at Ford Field.

Slay had been on the NFI list since the start of camp, but the cornerback was on the field in uniform Friday.

Slay, who was hoping for a new contract, did not attend minicamp this offseason, but he reported for training camp with the rest of the team last month and said his contract wishes wouldn't hurt his play. Slay is in the third year of his $50 million, four-year deal.

Detroit drafted Slay 36th overall in 2013. He earned All-Pro honors in 2017.