Glasnow was to be evaluated by team physicians Sunday, and Pirates management is eager to hear the medical reports and to see how Glasnow said his throwing shoulder felt.
"Feel like we caught it early," general manager Neal Huntington said. "That's always good. ... Yet we still don't have a ton of information."
After an erratic start in which he allowed four hits, three walks and five stolen bases and hit two batters over three-plus innings, Glasnow was hesitant to discuss his injury in detail.
Huntington indicated that Glasnow had been bothered previously by shoulder pain. Huntington also stressed that the Pirates prefer to have their young players being proactive in relaying injury or feelings of discomfort.
"The last place he wants to be is on the disabled list," Hunington said. "[But] with our young players, we're going to be conservative, and we're going to do everything in our power. If he's ready on Day 16, great. If he's not, we're going to take the time it's going to take to get healthy, because we need him healthy and effective."
Glasnow has pitched 110 1/3 innings this season, all but 8 1/3 of which have been for Triple-A Indianapolis, where he was arguably the International League's best pitcher this season (7-3, 1.94 ERA, 122 strikeouts and 59 hits allowed in 102 innings).
Glasnow is ranked as baseball's No. 8 prospect, according to MLBPipeline.com. Before being recalled Saturday, Glasnow had only pitched in the Majors in a July 7 start at St. Louis in which he was charged with four runs on three hits and two walks in 5 1/3 innings.
• Top 100 Prospects
"The No. 1 focus now has to be [getting] healthy," Hurdle said. "He's got game traction in so many areas over the years. … He's had some things quite frequently brought to his specific attention that he's got to work on going forward, which can be a blessing."
Around the horn
• A.J. Schugel was sent to Indianapolis on Saturday, but he never even made it out of Pittsburgh. Late Saturday night, Hurdle called Schugel while the right-handed reliever was at his apartment in Pittsburgh and informed him that he was -- hours after being officially optioned to Triple-A -- recalled to the Majors.
Hurdle stressed on Saturday that Schugel's demotion was not performance-related. Schugel has a 3.33 ERA in 18 appearances over June and July. He's pitched more than one inning 14 times this season.
"Putting A.J. back in play makes all the sense in the world right now because of the multitude of roles he can carry and multiple innings he can post up."
• A day after being recalled to the Majors for the first time other than a September callup last year, catcher Elias Diaz earned his first start Sunday. He was batting seventh.
"I definitely didn't think it was going to come this soon," said Diaz, who hit .341/.417/.439 over 12 Minor League games this season following rehab from right elbow surgery.