Lavarnway, 27, hit .283/.389/.370 in 62 games for Boston's Triple-A affiliate in 2014. He is a .201/.249/.315 hitter with five home runs in 301 Major League plate appearances since 2011. He spent his entire career with the Red Sox before being claimed off waivers by the Cubs last week.
The 30-year-old Berry hit .285/.382/.367 in 112 games last season with Triple-A Norfolk.
Cash Kruth is a reporter for MLB.com. Follow him on Twitter at @cashkruth. This story was not subject to the approval of Major League Baseball or its clubs.