BOSTON -- Tyler Glasow has been stretching himself out since coming to the Rays via the trade that sent Chris Archer to the Pirates on July 31.
Glasnow worked exclusively out of the bullpen for the Pirates this season, but he has only started for the Rays. To date, the right-hander has produced good results, becoming the first pitcher in franchise history to begin his Rays career with three consecutive starts of two hits or fewer and one run or fewer.
Glasnow pitched five innings last time out in a no-decision against the Blue Jays, and he'll continue building up when he starts Saturday night at 7:10 p.m. opposite Red Sox left-hander David Price. The start will be Glasnow's first appearance at Fenway Park.
During Spring Training, it's common to see pitchers building their endurance, or stretching out, to pitch deeper into games. It's not a common practice during the regular season. There are fundamental differences between stretching out during Spring Training and during the regular season.

"The games mean something [during the regular season]," Rays manager Kevin Cash said. "The innings mean something. The outs mean something. Spring ... it's all based on stretching out. You have to balance trying to win the ballgame when the regular season starts. But I don't think there's a ton of change whatsoever as far as the step-by-step process."
Glasnow noted that "starting the games is really the only difference."
"But the last two have felt similar to a start, and it doesn't feel any different until I come out earlier," Glasnow said. "I think I'm close to being built up so starting to feel pretty good [as a starter].
"I'd been a starter for so long [in the Minor Leagues], it didn't take too long to get back into that feeling ... just small little changes."
Cash told reporters he's "very, very pleased" with Glasnow's progression thus far. He'll be on a pitch count Saturday, but Cash noted that "after that he's probably going to be in that 100-pitch mix."
Worth noting
• Thursday in New York, Adam Kolarek inherited the bases loaded with no outs in the ninth and retired all three batters faced for his first career save. According to Stats, LLC, he became the first pitcher in club history to enter with no outs in the ninth inning or later and the bases loaded, strand all three inherited runners and earn the save.

• In March, the Rays announced a season-opening rotation of Archer, Blake Snell, Nathan Eovaldi and Jake Faria. Each of the pitchers spent time on the disabled list, and Archer and Eovaldi were traded in July. After Friday night's start, the Rays will have used starters other than that quartet in 61 of 122 games.