For what it's worth, ZiPS, Steamer and FanGraphs Depth Charts project Todd Frazier with rest-of-season WAR of 1.0, 1.2 and 1.2:
http://www.fangraphs.com/statss.aspx?playerid=785&position=3B
As points of reference, here the the ZiPS rest-of-season projections for Red Sox hitters:
http://www.fangraphs.com/projections.aspx?pos=all&stats=bat&type=rzips&team=3&lg=all&players=0&sort=24,d
And the Steamer ROS projections for Red Sox hitters:
http://www.fangraphs.com/projections.aspx?pos=all&stats=bat&type=steamerr&team=3&lg=all&players=0&sort=27,d
... and the FanGraphs Depth Charts projections:
http://www.fangraphs.com/projections.aspx?pos=all&stats=bat&type=rfangraphsdc&team=3&lg=all&players=0&sort=24,d