Eurobasket.com (using a foreign-based fan as a journalist who may be jumping the gun) reports:

Marcin Gortat

Spartak Saint Petersburg made a strong market move. They have reportedly agreed on terms of contract with Marcin Gortat (213-C-84). The 27-year-old centre has been playing in the NBA since 2007. Last season Marcin Gortat started in the Orlando Magic. He tallied 4.0 points and 4.7 rebounds per game. In December the centre was traded into the Phoenix Suns. There his stats came up to 13.0 points, 9.3 boards and 1.3 blocks per appearance. Before moving to the NBA Marcin Gortat had spells for Koeln and Lodz. Marcin Gortat is the member of Polish National Team. The centre posted 18.0 points, 8.9 rebounds, 2.3 blocks and 1.6 assists per game in 2011 EuroBasket Qualifying Round.

UPDATE: Several reports say that Gortat’s agent denies that the signing has taken place.