Police ask public's help identifying man wanted for Bronx robbery pattern

Police are asking for the public's help identifying a man in connection to two robberies in the Bronx. 
The first robbery happened July 15 on Eagle Avenue and East 157th Street as a 27-year-old man was delivering food.
The suspect approached the deliveryman with a gun and demanded cash before running away. 
Police say the second robbery happened on July 24, near the intersection of Tiffany and Kelly streets. They say the same suspect approached a 49-year-old man with a gun inside the lobby of a residential building. According to police, the suspect demanded cash from the victim then took off. 
He is described as being 40 years old, 5'9'' to 5'10'' tall, and was last seen wearing a black shirt, gray shorts and black sneakers.
Anyone with information is asked to call Crime Stoppers at 1-800-577-TIPS.