5:33pm: The Diamondbacks were indeed working to acquire Garza today, Olney reports (on Twitter).
12:58pm: Lefty Patrick Corbin has been scratched from his start for Arizona's Triple-A affiliate, tweets Chris Gabel of the Reno Gazette-Journal. Magruder has been told Corbin will not be moved, but says he guesses things could change in what Kevin Towers likes to call the "lightning round."
12:46pm: The Diamondbacks are not currently discussing a deal with the Cubs involving Upton and Garza, reports MLB.com's Steve Gilbert. It was only Olney's speculation in the first place.
12:31pm: The D'Backs are "working hard on something big," tweets ESPN's Buster Olney. Olney feels that an Upton-Matt Garza framework makes sense for the Cubs and Diamondbacks. Upton does have the Cubs on his no-trade list, notes Olney.
10:56am: Diamondbacks managing partner Ken Kendrick dismissed talk of acquiring Lee, Jack Magruder of FOXSportsArizona.com reports (Twitter links). "He is owed $100MM. If they want to keep $90MM" Kendrick said. "Really problematic to move him." Arizona would still like to acquire a starter, but Kendrick says we should not expect front page news.
8:37am: The Diamondbacks are one of the teams to which Lee can block a trade, notes Rosenthal.
8:08am: The Diamondbacks say Upton is definitely staying and there is no truth to rumors of Lee or Hernandez, tweets Bob Nightengale of USA Today. That, of course, does not make Rosenthal's report of the D'Backs seeking an ace pitcher untrue. Meanwhile, Nightengale notes that the club is likely to trade shortstop Stephen Drew today.
3:59am: The Diamondbacks are trying to swing a blockbuster for an unknown ace starting pitcher, reports Ken Rosenthal of FOX Sports. One rival executive "received indications that the Phillies and Diamondbacks had discussed a deal involving Cliff Lee and Justin Upton," but that scenario is unconfirmed and it is not known whether the D'Backs are among the 21 teams to which Lee can block a trade. Plus, Kevin Towers and company would need serious assistance covering the $95.1MM guaranteed to the Phillies' lefty through 2015.
Rosenthal notes that the Mariners inquired on Upton earlier this month, but talks failed to progress. Given that club's repeated comments on and off record, we can probably forget about Felix Hernandez.
Rosenthal did not mention the Marlins' Josh Johnson, who is reportedly expected to stay put through today's deadline. It's difficult to name another ace-like starting pitcher on whom a team might listen.