Lookout Linkage, 8/4/15

Links!

• The Cubs have optioned reliever Yoervis Medina to Triple-A.
• A.J. Burnett's career may be over following an elbow injury (UPDATE: It's just an elbow strain and he will only miss around four weeks).
• Meanwhile, Cubs starter Dan Haren has indicated that he may retire at the end of the season.
• The Rockies have promoted top pitching prospect Jon Gray to the big leagues and he will make his debut tonight against the M's.
• Royals' starter Yordano Ventura and Blue Jays' outfielder Jose Bautista took to Twitter to discuss their dislike of one another.
• Kiley McDaniel at Fangraphs grades each prospect dealt at the trade deadline.
• Dave Cameron at Fangraphs notices that the Blue Jays' lineup is a little too overbalanced with right-handed hitters.