The Yankees traded closer Aroldis Chapman to the Chicago Cubs on Monday and their dealings of lefty relievers to the National League Central may not be over.

On Thursday FanRag's Jon Heyman wrote that the St. Louis Cardinals are in need of bullpen help as they make a final push for the Wild Card (the division's probably out of their grasp unless the Cubs tank; STL's 6.5 games back) and it figures that New York lefty Andrew Miller -- a constant source of trade rumors -- would fit.

Writes Heyman about the Cards' back-end bullpen situation:

The Cardinals are a surprise new entry in the relief market. Even before former closer Trevor Rosenthal went on the disabled list, the Cardinals were looking around for back-end relief help.

Seung-hwan Oh, aka The Final Boss, has done a terrific job. But Trevor Rosenthal's slump and injury has them scouring the market.

Oh has six saves in seven chances with a 1.72 ERA and just two homers allowed. Opponents are hitting just .160 against him on the season.

Meanwhile, Rosenthal lost his closer's job after blowing four of his 18 save chances. He's 2-4 on the year with a 5.13 ERA. He's allowing batters to hit .301 against him on the year.

Now, with the Cubs having secured Chapman and the fact that the Los Angeles Dodgers and Miami Marlins, both ahead of St. Louis in the NL Wild Card, don't appear to be going anywhere, the Cardinals need to fortify a weak part of their roster if they want to return to the postseason for the sixth straight year.

Miller, with a 1.77 ERA in 107.0 innings the past two seasons, is under control through 2018 at $9 million a year and would net a large haul of top prospects for the Yankees if they decide to really go in rebuilding/sell-mode despite a 52-49 record this far this season. (The trade deadline is Monday, Aug. 1., at 4 p.m.)

Miller was said to be dangled in front of the Washington Nationals within the last week but they reportedly balked at the Yanks' asking price. Miller would remain high for St. Louis (and most rate their farm system as average), but it might be tempting enough for them to go through with it.

Ryan Hatch may be reached at rhatch@njadvancemedia.com. Follow him on Twitter @ryanhatch. Find NJ.com on Facebook.