8:04am: Jon Heyman of CBS Sports tweets that the White Sox did not turn down Martinez for Ramirez, though he wouldn't be surprised if the Cardinals are indeed interested in Chicago's shortstop.

12:29am: The White Sox have as many trade chips as any deadline seller in the majors and they're putting a high price tag on their key players. According to Mark Gonzales of the Chicago Tribune, the Sox recently turned down a trade offer from the Cardinals that would have sent shortstop Alexei Ramirez to St. Louis in exchange for right-hander Carlos Martinez, one of the many elite prospects in the Cards' minor league system. Gonzales said the deal was "involving" those two players, so it was likely not a one-for-one swap.

The Cardinals had been relying on Pete Kozma at short ever since Rafael Furcal underwent Tommy John surgery in March, and while Ramirez's production has dropped, he still would've presented a big upgrade. Ramirez entered Tuesday's play hitting .284/.310/.357 in 408 PA but only one homer and 23 RBI. Ramirez averaged 17 homers per year from 2008-11 but has just 10 homers total over 1029 PA in 2012-13. While his power isn't what it used to be, Ramirez has 20 steals (in 26 chances) this year and is one of the game's better defensive shortstops, with an 8.5 UZR/150 this season and a 7.7 UZR/150 for his career.

Ramirez still has value, but he turns 32 in September and is owed roughly $22MM through the end of the 2015 season, plus a $10MM club option for 2016 that can be bought out for $1MM. By that token it's surprising that the White Sox weren't willing to move the veteran for Martinez, a consensus top-40 prospect controlled through the 2019 season, though as noted, there may have been more to this trade than simply Ramirez for Martinez straight-up.

The 21-year-old Martinez was ranked as the third-best prospect in the St. Louis farm system by Baseball America, and he possesses "a biting curveball" and a changeup and could both become plus pitches. His fastball has touched 100 mph but usually clocks in the 94-98 mph range. Martinez made his Major League debut this season and has 11 strikeouts in 10 1/3 relief innings. His 6.10 ERA is largely due to a tough outing last Friday when he allowed three runs in a third of an inning against San Diego.

Also from Gonzales, Jake Peavy and Jesse Crain are drawing a lot of interest and scouts from the Diamondbacks, Reds, Braves, Red Sox and Dodgers are expected to be in Chicago through the end of the week to watch one or both men pitch. Peavy just recently returned from a DL stint while Crain is currently on the DL with a sprained right shoulder but could be activated by Sunday.