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7/30/2014 8:36 P.M. ET

Hernandez to make spot start Thursday

CHICAGO -- Having used scheduled Thursday's scheduled starter Tyler Matzek in relief at the end of Tuesday night's 4-3, 16-inning loss to the Cubs, the Rockies are calling up lefty Pedro Hernandez from Triple-A Colorado Springs for the final game of the series.

Hernandez (6-6, 6.16 ERA at Colorado Springs) has appeared in 15 games, including 13 starts, in the Majors with the White Sox (2012) and Twins (2013) and is 3-4 with a 7.57 ERA.

Weiss said Matzek will not be skipped, but his next start will be pushed back.

LeMahieu laments not squeezing out key run

CHICAGO -- The unexpected is often at the root of poor execution. Rockies second baseman DJ LeMahieu was the victim during the 10th inning of Tuesday night's 16-inning, 4-3 loss to the Cubs at Wrigley Field.

With runners at second and third and a 1-1 count, the Rockies dialed up a suicide squeeze with Justin Morneau at third. But Cubs relief pitcher Blake Parker's pitch was low and outside. LeMahieu couldn't reach it, and Cubs catcher Welington Castillo easily chased down Morneau.

"He [Parker] was around the strike zone the whole inning, so the chances of him throwing a strike there were pretty good, but he just didn't," said LeMahieu, who proceeded to strike out to end the inning. "That was a chance to win the game right there."

Manager Walt Weiss said he thought the call came at the right time, with a good bat-handler in LeMahieu. Morneau's speed, or lack thereof, was less important to Weiss than the count and the pitcher. But Parker's pitch made it look bad.

"That's kind of the way it's gone," Weiss said.

Usually one to hide his emotions publicly, Weiss's manner after the game could best be described as icy after the Rockies didn't score for the final 15 innings.

"It was just a frustrating loss," Weiss said. "Three-hour losses are bad enough. But 6 1/2-hour losses are, I guess, twice as bad -- and then some."

Rosario catches break after working overtime

CHICAGO -- Upon arriving at Wrigley Field Wednesday, Rockies catcher Wilin Rosario leaned into manager Walt Weiss' office and announced, "I can pitch today."

Cubs catcher John Baker, of course, wound up being the winning pitcher in Tuesday night's 16-inning, 4-3 Rockies loss. Rosario grounded into a double play to end the top of the 16th, and noted the difficulty of facing a non-pitcher. The Rockies couldn't slow down their bats enough for Baker's 76-mph lobs.

"It's hard, after seeing hard pitches all night and then seeing something like that," Rosario said. "It's like playing baseball and then someone pitching a softball. I don't know."

The Rockies used nine pitchers, including usual starter Tyler Matzek at the end. Had the game gone much longer, the Rockies would have used shortstop Charlie Culberson on the mound. Either Rosario or backup catcher Michael McKenry would have ended up playing the field. Both have played third base and McKenry said he could play at second base.

Rosario said he felt fresh Wednesday. But after seeing Rosario catch 282 pitches, and that's not counting warmup pitches, Weiss went with McKenry.

Thomas Harding is a reporter for MLB.com. Read his blog, Hardball in the Rockies, and follow him on Twitter @harding_at_mlb. This story was not subject to the approval of Major League Baseball or its clubs.