Nicholas Bruno Rumbelow (born September 6, 1991) is an American former professional baseball pitcher.

He made his MLB debut in 2015 with the New York Yankees and has also played for the Seattle Mariners in Major League Baseball.

Listed at 6 feet 0 inches (1.83 m) and 190 pounds (86 kg), Rumbelow both throws and bats right-handed.

[4][5] Rumbelow made his professional debut with the Staten Island Yankees of the Class A-Short Season New York-Penn League.

[9] He made his major league debut the next day, allowing one run in a blowout loss to the Philadelphia Phillies.

The team announced that Rumbelow would undergo Tommy John surgery, forcing him to miss the remainder of the 2016 season.

[21] Rumbelow suffered a brachial plexus injury in the beginning of spring training in 2018 and was on the disabled list until June.

[28] On June 25, 2019, Rumbelow signed with the Sugar Land Skeeters of the Atlantic League of Professional Baseball.