ORLANDO, Fla. — The NFL will place a heavy emphasis on enforcing its player conduct rules, something Rams coach Jeff Fisher calls “a front-of-the-book issue.”

As the league's spring meetings wrapped up with Commissioner Roger Goodell saying expansion of the playoffs next season is possible, sportsmanship — and lack thereof — was a prime topic.

In other moves, the owners approved an experiment in which extra-point kicks will be taken from the 20-yard line for two weeks in the preseason. They also adopted proposals to extend the length of the goalposts 5 feet to 35 feet to better determine if kicks are good, to no longer stop the clock on sacks and to allow video reviews on plays with a recovery of a loose ball on the field even though the play had been whistled dead.

CHICAGO — The Chicago Bears replaced one accomplished veteran pass rusher with another when they agreed to terms with Jared Allen on a four-year contract.A person with knowledge of the agreement told The Associated Press that Allen will get $15.5 million guaranteed on a deal that could be worth as much as $32 million.

TAMPA, Fla. — Steve Masiello's promising coaching career is in limbo after his deal with South Florida fell apart because he doesn't have a college diploma.Manhattan College said that it had placed him on leave while Masiello is “reviewing his degree status.”South Florida confirmed that the school had an agreement in principle to lure Masiello away from Manhattan, but that the contract was contingent on “a verification of credentials.”

LOS ANGELES — Clayton Kershaw will miss his scheduled start for the Los Angeles Dodgers against the San Diego Padres this weekend because of an inflamed muscle in his back.

NEW YORK — Forbes ranks the New York Yankees as baseball's most valuable team for the 17th straight year and lists the Tampa Bay Rays with the lowest valuation.Forbes estimates the Yankees are worth $2.5 billion, up 9 percent from last year. The Dodgers are next at $2 billion.