The Kansas City Chiefs have signed Spencer Ware to a two-year extension worth $3.6 million in 2017 and 2018.

The deal can be worth up to $9.6 million based on yards and touchdowns.

Ware gives the Chiefs depth at running back.

Husain Abdullah has retired from the NFL, citing his health as the primary deciding factor. 

Abdullah suffered five concussions in his seven-year career.

Abdullah thanked the Minnesota Vikings for signing him as an undrafted free agent in 2008 and called his three seasons with the Kansas City Chiefs "the most enjoyable football experience in my entire life."

Kansas City used Abdullah, a part-­time starter over his three seasons, in a variety of roles. 

Justin Houston underwent ACL surgery in February and could miss the entire 2016 season.

The Kansas City Chiefs' trainer said the normal rehab period for such a procedure is between six and 12 months.

"We're hoping just because of his work ethic and he's been a fast healer in the past that's not the case and that he'll be able to play this season,'' Andy Reid said. "It's too early to be able to tell on that.''

Houston is one year removed from a 2014 season in which he led the NFL with 22 sacks.

Sean Smith has agreed to sign with the Oakland Raiders on a four-year, $40 million deal.

Smith will receive $20 million in guaranteed money.

Smith joins the Raiders after three seasons with the Kansas City Chiefs in which he improved their secondary at cornerback.

Smith played the first four seasons of his career in Miami after the Dolphins selected him in the second round of the 2009 draft.

The NFL has fined Andy Reid and John Dorsey of the Kansas City Chiefs for violating the NFL's anti-tampering policy.

The Chiefs will lose their third round pick in 2016 and a sixth rounder in 2017 for illegal tampering on their signing last offseason of Jeremy Maclin.

The sanctions were announced shortly after the start of the 2016 free agency.

Chase Daniel has agreed to sign with the Philadelphia Eagles.

Doug Pederson wanted the Eagles to sign Daniel regardless of how the situation with Sam Bradford played out.

Tamba Hali has signed a three-year deal with the Kansas City Chiefs.

Despite lingering knee soreness and a broken thumb that forced him to play at the end of the season with a cast on his right hand, Hali was selected in 2015 to play in the Pro Bowl for a fifth time.

Hali, 32, was second on the Chiefs with 6.5 sacks last season.

Hali was a first round pick by the Chiefs in 2006.

The Kansas City Chiefs plan to place the franchise tag on safety Eric Berry, effectively keeping him off the free-agent market when the signing period begins March 9, according to sources.

Berry capped a remarkable 2015 season by being named NFL Comeback Player of the Year by The Associated Press.

Berry joined the Chiefs as a first-round draft pick in 2010 from Tennessee.