BB% has gone from around 8% in April to 5% in May.
SO% has gone from around 28% in April to 20% in May.
Or, I guess another way to look at it is that balls put into play per plate appearance have gone from around 64% to 75% over the same time frames? There's a bit of noise in there from hitters safe on errors, baserunning outs, HBP, etc, but I wouldn't think it drives off of the 64% or 75% all that much.
A better base running team than last season putting more balls into play lately. I'm a fan.