Gonzales, the Cardinals' top-ranked pitching prospect per MLB Pipeline, spent the last several weeks allowing inflammation in his shoulder to subside and addressing areas of weakness through a strengthening program.
The way the next few weeks go for Gonzales will have an influence on the organization's potential non-waiver Trade Deadline pursuits. Mozeliak said that the upcoming performances from Tyler Lyons and Tim Cooney, as well as the status of Jaime Garcia, will also help clarify how serious a look the Cardinals will give to adding a starting pitcher before July 31.
"We have all these different variables, yet there is a lot of unknown," Mozeliak said. "As the calendar gets closer to the 31st, we should have some reasonable expectations of all four of those guys."
• Luis Perdomo, a right-handed starter with low Class A Peoria, has been added to the World Team for the SiriusXM All-Star Futures Game. The Cardinals submitted Perdomo as a replacement for Alex Reyes, who won't be able to participate due to soreness in his right shoulder.
Reyes, the organization's No. 3 prospect per MLB Pipeline, should be cleared to resume pitching within a week of the July 12 showcase game, Mozeliak said. Perdomo, 22, is 4-7 with a 2.79 ERA in 13 starts for Peoria.
• Matt Holliday, who was supposed to increase his running and agility work on Monday after dealing with flu-like symptoms, instead spent the day in the hotel. Manager Mike Matheny said the team wanted him quarantined to avoid having the illness spread through the clubhouse.
• Jon Jay (stress reaction in left wrist) returned to his home in Miami after the Cardinals prescribed him a week of rest. "Let's just see how he responds to that," Mozeliak said.
• Jordan Walden (inflammation in right biceps) threw a bullpen session at Busch Stadium on Monday. He's expected to throw two more this week, take a few days off over the All-Star break and then head out on a Minor League rehab assignment that Mozeliak said "could be pretty quick."
• Matt Belisle (inflammation in right elbow) traveled with the team to Chicago, but the Cardinals don't yet have a feel for whether he'll be ready to come off the DL when the All-Star break is over. Similarly, the club is going to see how the week goes for Garcia (strained left groin) before projecting when he might return.
Jenifer Langosch is a reporter for MLB.com. Read her blog, By Gosh, It's Langosch, follow her on Twitter @LangoschMLB, like her Facebook page Jenifer Langosch for Cardinals.com and listen to her podcast. This story was not subject to the approval of Major League Baseball or its clubs.