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7/31/2014 7:49 P.M. ET

Using starters in 'pen causes rotation shuffle

CHICAGO -- Rockies left-handed pitcher Tyler Matzek reported feeling no worse for the wear Wednesday, roughly a day and a half after his impromptu relief appearance late Tuesday night.

Matzek was scheduled to pitch Thursday against the Rockies, but he entered in the 16th on Tuesday, and was the losing pitcher in the 4-3 loss to the Cubs. Rockies manager Walt Weiss said the Rockies will re-insert Matzek into the rotation. That could happen Saturday against the Tigers, since Saturday's scheduled starter, lefty Yohan Flande, threw 1 2/3 scoreless relief innings in Thursday afternoon's 3-1 loss to the Cubs.

"I think I'm fine; it was just a normal short bullpen for me -- an extra bullpen between starts for me," said Matzek, who had thrown a bullpen session on Monday. "I've always been really durable. It felt fine that night and it feels fine now."

The Rockies had to purchase the contract of left-handed pitcher Pedro Hernandez from Triple-A Colorado Springs and designate corner infielder Ryan Wheeler for assignment to make the move.

There are plenty of options for the rotation going forward. Righty Jordan Lyles, out since June 4 with a broken left hand, will make his second and possibly final injury rehab start Thursday night for Colorado Springs.

Wheeler designated to make room for Hernandez

CHICAGO -- Since the Rockies have depth at first base, they designated the left-handed-hitting Ryan Wheeler for assignment so they could purchase the contract of lefty Pedro Hernandez -- Thursday afternoon's starter against the Cubs.

Wheeler was designated to make room for Hernandez on the 40-man roster, and right-handed reliever Rob Scahill, the winning pitcher on Wednesday, was optioned to Colorado Springs to make room on the 25-man roster.

Called up twice during periods of injury at first and third base, Wheeler, 26, batted .232 with two home runs and 13 RBIs in 31 games (56 at-bats). The move means the Rockies have 10 days to trade, release or outright Wheeler if he's not claimed by another club during the waiver period.

The decision to designate Wheeler occurred hours before the non-waiver Trade Deadline, but according to the club, it had more to do with clearing a spot for Hernandez than any pending deal.

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.