7:38pm: A source tells Piecoro that the Red Sox are one of several teams interested in Saunders (Twitter link).
Saunders was considered a non-tender candidate earlier this offseason, but the D'Backs apparently offered him a two-year contract earlier this week. Saunders' camp countered Arizona's offer, but nothing yet has come of that, and during a conference call with reporters to discuss the Cahill trade, D'Backs GM Kevin Towers said there's a "significant gap" between the sides.
MLBTR's arbitration projection pegs Saunders for a salary of $8.7MM in 2012. He's logged no fewer than 186 innings in each of the past four seasons but was worth just 6.6 WAR in that span, according to Fangraphs.