Toronto Blue Jays outfielder Lourdes Gurriel Jr. was held out of the starting lineup against the Boston Red Sox Tuesday night because of hamstring tightness.

Gurriel's hamstring tightened up during Monday's 6-2 win over the Red Sox, tweets TSN Blue Jays Reporter Scott Mitchell, adding Gurriel will be re-evaluated on Wednesday.

While he didn't start Tuesday, the 28-year-old did pinch hit in the ninth inning, striking out against left-hander Jake Diekman. He then stayed in to play first base in extra innings as the Blue Jays came back to win 6-5.

In 17 games this season, Gurriel is batting .297 with two home runs and 10 runs batted in. 

Mitchell also reports that starting pitcher Hyun Jin Ryu, who has been dealing with forearm inflammation, threw a bullpen session Tuesday.

Ryu's timeline remains uncertain, but he appears to be nearing a return to the mound. 

The 35-year-old lefty is 0-0 in two starts with a 13.50 ERA  over 7.1 innings so far this season.