Rosenthal On Royals, Uehara, D’Backs, Span, Catching

Here are the latest hot stove items from FOX Sports' Ken Rosenthal….

• Teams in search of bullpen help have been looking at Royals right-handers Greg Holland and Aaron Crow, though Kansas City isn't likely to trade any of its Major League players unless they can move Jeff Francoeur.
• The Royals bolstered their pitching staff by re-signing Jeremy Guthrie and trading for Ervin Santana, but Rosenthal still feels the team needs a true ace.
• The Phillies are interested in free agent reliever Koji Uehara.
• The Diamondbacks could deal Jason Kubel instead of Justin Upton, which would be an easier move to make though Kubel would bring back a lesser return.  A source tells Rosenthal that the Rangers are still interested in Upton but are waiting for the D'Backs to back down on their demands for Elvis Andrus or Jurickson Profar in return.
• Denard Span could be a good trade target for a club that doesn't want to pay for one of the expensive center fielders on the free market.  With the Twins desperate for pitching, Rosenthal speculates that a team like the Braves (who need a center fielder and have pitching depth) could be a trade partner.
• The free agent catching market is stalled since the Red Sox and Blue Jays have catchers available for trade, plus the Yankees are waiting to address their pitching before making a decision on Russell Martin.
• Speaking of the Blue Jays' catching depth, Rosenthal thinks that Toronto is in no hurry to deal J.P. Arencibia, as a dependable catcher is needed if top prospect Travis D'Arnaud hasn't recovered from his season-ending knee injury.
• Reed Johnson is drawing interest from several teams, including the Braves, who acquired Johnson from the Cubs last July.