Surveillance video shows the suspects throwing the man to the ground and hitting him several times.
It happened on Sunday on 3rd Avenue in the Melrose section.
Police say the suspects took the 36-year-old's cellphone and about $100.
They are asking for help tracking down the perpetrators.
Call the NYPD's Crime Stoppers Hotline at 1-800-577-TIPS (8477) or for Spanish, 1-888-57-PISTA (74782). You can also submit tips by visiting the CrimeStoppers website at crimestoppers.nypdonline.org or by messaging on Twitter @NYPDTips.
ALSO READ | Wounded bystander speaks out after gang-related mass shooting in Queens
* More Bronx news
* Send us a news tip
* Download the abc7NY app for breaking news alerts
* Follow us on YouTube
Submit a News Tip