Fanendo Adi’s third season in Major League Soccer could be his last.

The Portland Timbers forward has generated interest from two European clubs – Crystal Palace in the Premier League and St. Etienne in France's Ligue 1 – league sources have told Yahoo Sports.

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Adi, who helped Portland win its first MLS Cup last December, also has a potential suitor in Shanghai Shenhua from the Chinese Super League, which began a spending free in the winter transfer window that included the signing of Seattle Sounders forward Obafemi Martins.

Given England's strict standards for foreign players who do not hold European Union passports, Adi likely will need several more appearances with Nigeria's national team before he can qualify for a work permit. The 25-year-old received his first national team call-up in March.

The growing interest in Adi is not surprising. His combination of size at 6-foot-4 and solid skills on the ball make him an intriguing prospect. With his reduction in turnovers and improvement in decision making in the final third, Adi became the talisman for a Timbers side that rode a late-season surge to the MLS crown.

He has made 65 appearances in MLS and scored 31 goals.

A source also said former Real Salt Lake player Carlos Salcedo could be heading to Europe. The current Chivas defender is being tracked by the likes of Swansea City in the Premier League and Bundesliga club Hertha Berlin. Salcedo has five caps with Mexico since making his debut last year.