Toronto sent Jakob Poeltl to the San Antonio Spurs as part of the Kawhi Leonard trade, so the Raptors have a clear hole at center. Playing Serge Ibaka or Pascal Siakam out of position are their only options to spell Valanciunas.
Lewenberg noted, however, Monroe wouldn't be an ideal addition because his defense close to the basket leaves something to be desired.
While Monroe is a solid scorer and rebounder, he could leave the Raptors exposed in the paint defensively. Valanciunas has his own problems on defense. Opposing teams can exploit the 26-year-old by pulling him away from the basket and switching him oto athletic guards.
Toronto isn't in a position to be picky, though. Monroe is one of the best centers available, and he'd likely settle for the $5.3 million mid-level exception—the only avenue through which the cash-strapped Raptors can make another big signing.