NL Central Notes: Hart, Choo, Arroyo, Cardinals

Brewers GM Doug Melvin indirectly shed some light on the philosophical differences which led to trading Brett Lawrie to the Blue Jays. Lawrie's name came up when Melvin told Michael Hunt of the Milwaukee Journal Sentinel the plan is to keep second base prospect Scooter Gennett in Triple-A for the full season instead of being promoted because of the struggles of Rickie Weeks. "The plan worked for (Prince) Fielder and Corey Hart and all those guys," Melvin said. "Spend your time at each level. That's the part I couldn't get through with Brett Lawrie. He wanted to go past everybody. That model works if you're a freak like Ryan Braun, but he did play at every level. I always say to go out and prove you're too good for the league. If you do that, we'll consider moving you up." Instead Melvin, moved Lawrie out to Toronto. In other news from the the NL Central:

• Brewers manager Ron Roenicke told reporters, including MLB.com's Adam McCalvy, there is no plan to send Corey Hart, recovering from right knee surgery, on a minor league rehab assignment before June 1. This means Hart, who is eligible to be activated from the 60-day disabled list on May 30, will not join the Brewers until mid-June, at the earliest. 
• The number of years and not money will be the issue for the Reds in trying to re-sign Shin-Soo Choo, tweets John Fay of the Cincinnati Enquirer. Choo ranks second on MLBTR's 2014 Free Agent Power Rankings.
• If Choo does re-sign with Cincinnati, a payroll casualty could be Bronson Arroyo. In a second tweet, Fay says the Reds' payroll is a big puzzle and there are lots of factors involved in trying to retain both Choo and Arroyo.
• Bernie Miklasz of the St. Louis Post-Dispatch opines merit is not behind the Cardinals' decision to replace the injured Jaime Garcia with fellow left-hander Tyler Lyons, but a desire to delay the service clock of their top pitching prospect, Michael Wacha. This is the second time Wacha, owner of an 1.89 ERA in eight Triple-A starts, has been bypassed to fill a rotation opening. Miklasz further believes the Cardinals, owners of the best record in the National League, don't have the best 25 players in their system on the active roster citing top prospect Oscar Taveras toiling away in Triple-A while Shane Robinson and Ty Wigginton are struggling offensively. 
• Cardinals GM John Mozeliak disagrees with Miklasz's assessment. "I’m not worried about the clock," Mozeliak was quoted as saying by the Post-Dispatch's Derrick Goold (via Sulia). "The media is making a lot of the clock. Other people who read the media are making more of it. To me it’s like that’s not what is making our decisions. It’s managing our decisions for what’s best for the club and what’s best for the individuals in their own silo of development."
• Chris Carpenter is continuing to make progress in his recovery from nerve trouble in his neck and back soreness and could make a rehab start in early June, Goold reports. "I’m not going to push myself back," Carpenter said (as quoted by Goold on Sulia). "I’m going to make sure that I’m healthy and that I know everything is going to work and that I can go out there and take that grind of the amount of pitches and innings it takes to go the rest of the year." Carpenter threw three simulated innings Saturday, will throw a side session Monday, and throw another four simulated innings Thursday, according to MLB.com's Jenifer Langosch and Chad Thornburg.