SANTA CLARA, Calif. -- When Justin Smith decided that his body wouldn't let him perform up to his own lofty standards, he knew it was time to stop playing.
Smith announced Monday that he is retiring after 14 seasons as one of the top defensive linemen in the NFL, dealing yet another blow to the San Francisco 49ers in a rough offseason.
"They all want you to keep playing, and I want to keep playing as well, but when you get on the bald tires, you're on the bald tires," Smith said.
One of the most durable players at one of the most physically demanding positions, Smith had been hampered the past two seasons by a bum left shoulder that he first hurt in training camp in 2013.
That shoulder absorbed the brunt of the punishment as a right defensive end going up against 300-pound linemen all game and Smith did not feel up to playing another season (see full story).
Chargers: Will SD pay $300M, NFL $200M for stadium?
SAN DIEGO -- An advisory group appointed by Mayor Kevin Faulconer recommended Monday that the Chargers contribute $300 million toward a new $1.33 billion stadium, with the NFL giving $200 million, the city and county $121 million each and personal seat licenses totaling $120 million.
Under intense pressure from the team and the NFL, the Citizen's Stadium Advisory Group said in its financing plan that there won't be tax increases or increases to the city's general fund, and that the financing plan doesn't rely on development to pay for the stadium, parking or infrastructure.
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Advisory group chairman Adam Day said he personally delivered a copy of the plan to both Chargers chairman Dean Spanos and Faulconer.
The Chargers are threatening to leave for the Los Angeles area unless they get a deal to replace aging Qualcomm Stadium (see full story).
Dolphins: Tannehill signs $77.7 million, 4-year extension
MIAMI -- Ryan Tannehill signed a $77.7 million, four-year extension with the Miami Dolphins that keeps him under contract through 2020, the team said Monday.
He's the first quarterback to receive an extension from the 2012 draft class that also included the Colts' Andrew Luck, the Redskins' Robert Griffin III and the Seahawks' Russell Wilson.
"We are thrilled that we were able to sign Ryan to an extension," said Mike Tannenbaum, executive vice president of football operations. "He is an ascending talent, a team leader and checks all of the boxes you are looking for at the position."
Last month the Dolphins exercised their fifth-year, $16.2 million option for 2016 on Tannehill's rookie contract. The eighth overall pick of the 2012 draft, Tannehill has started every game in his first three seasons and improved each year, although he has yet to lead Miami to a playoff berth.