ALLEN PARK — Less than 24 hours into the start of free agency, the Detroit Lions are busy.

 Reggie Bush and Glover Quin each are at the Lions practice facility on Wednesday morning.

 Defensive end Jason Jones, who lives in the Detroit area, visited Tuesday evening.

 Also, talks are heating up with cornerback Chris Houston who has been a priority for the Lions all along. Speculation is that they’re working on a three-year deal.

 The 27-year-old Bush played his last two seasons  with the Miami Dolphins where he started in 31 of 32 games. In 2012 he had 227 carries for 986 yards and six rushing touchdowns. He also had 35 receptions for 292 yards and a pair of receiving touchdowns.

His rushing yardage in 2011 (1,086) was a career-high so he doesn’t appear to be on the downside of his career.

 The Lions have promised Bush he would be an every-down running back, according to Jason Cole of Yahoo Sports.

 Quin, 27, started every game for the Houston Texans in the past three seasons and had five interceptions in his four seasons there.

  Jones, who attended Southfield-Lathrup and Eastern Michigan University, has a familiarity with Lions coach Jim Schwartz. He was drafted by the Tennessee Titans in the second round in 2008 when Schwartz was the defensive coordinator there.

Jones, 26, played in a dozen games for the Seattle Seahawks last season with three sacks, four pass defenses and 10 tackles. He was not a starter. 

Before his one season in Seattle, he played four seasons for the Titans and was a starter the last two (2010 and 2011).

The Lions have re-signed outside linebacker DeAndre Levy, offensive linemen Corey HIlliard and Amari Spievey. 

(Follow @PaulaPasche on Twitter. Order her new book,  “100 Things Lions Fans Should Know & Do Before They Die’’ here. It’s also available at bookstores.)