Contract negotiations between the Portland Timbers and Diego Valeri have turned sour, raising the possibility that the 33-year-old will not return to the club next season, multiple sources have told The Athletic.



ESPN’s Taylor Twellman first reported the news during Sunday’s broadcast of Portland’s 0-0 draw with Minnesota United.



Valeri is in the final guaranteed year of his contract, though the Timbers have an option to extend his current deal into 2020. One of the club’s three designated players, Valeri is making $2.42 million this season, according to the MLS Players Association.



Sources said that Valeri has grown increasingly frustrated with the Timbers over how the negotiations have played out. The Argentine wanted to have a new two-year, guaranteed DP deal signed before summer, but the Timbers, wanting to see how he held up physically over the first half of the year, waited until the middle of the season to open...