The Red Sox and designated hitter David Ortiz will go to an arbitration hearing Monday. Ortiz requested a salary of $16.5 million and was offered $12.65 million by the Red Sox when arbitration figures were exchanged last month. The two sides have failed to make much progress toward finding a number they can both agree on, but that could change within the next handful of days. Ortiz, 36, batted .309/.398/.554 with 29 home runs and 96 RBI in 146 games last season.