Let’s get one thing clear, the Red Sox cannot find replacements for Victor Martinez and Adrian Beltre, and improve offensively. Martinez batted .400 against lefties, Beltre was the best player on the team. Good luck finding that level of production on the trade market.
As far as replacing Victor Martinez, there is one thing everyone should remember: The Red Sox have Jarrod Saltalamacchia right now. It would not take much to be an improvement.
With Beltre, the Red Sox have some flexibility. They can go after a third baseman or move Kevin Youkilis to the hot corner and sign someone to play first.