Navarro, the Pirates' jack of all trades, has seen limited duty this season but came through with flying colors in his fourth start of the season.
The native of Puerto Rico lined a two-run homer just over the left-field wall to help the Pirates to their biggest offensive showing of the season. The roundtripper gave Pittsburgh a three-run lead and allowed the club to pass the five-run mark for the first time this season.
Navarro, who played sparingly with Boston in 2010 and 2011 and spent part of last season with Kansas City, entered Monday's contest with just one hit in 13 at-bats. His 2-for-4 performance pushed his average to .176. He also added a run-scoring groundout in the seventh and tied a career high with three RBIs.
"I feel good at the plate, and I'm getting better every day," Navarro said. "My swing is ready."
Navarro hit his first Major League homer on July 2, 2011, in Boston's 10-4 win at Houston. He began this season with one homer and 14 RBIs in 42 games.
For now he is embracing his utility role, although he is hoping for more chances to play. He has started four times, at three positions (third base, second base, left field).
"I've just got to be ready when they need me," he said.