Pats to extend Hightower’s deal for a fifth year

The Patriots had a pair of first-round draft picks in 2012, and they’re expected to pick up the fifth-year option for each guy. Per a league source, they’ll definitely do it for linebacker Dont’a Hightower. The 25th overall pick in the draft three years ago, Hightower will receive $7.8 million in 2016, guaranteed for injury…