No cause of death was immediately revealed, and police have launched a "death investigation" after the pitcher's body was found at his Phoenix home.

Former Orioles pitcher Brian Matusz, who also spent time with the Diamondbacks, was found dead on Monday, according to the Phoenix Police Department.

With reports of the death of the professional baseball pitcher Brian Matusz circulating online and beyond, people are wondering what happened. Matusz was a Major League Baseball (MLB) player affiliated with the Baltimore Orioles from 2009 to 2016.

Brian Matusz, a former Orioles left-handed pitcher and first-round draft pick, died Tuesday, the ballclub announced. He was 37. Matusz pitched parts of eight seasons in Baltimore after the club selected him with the No. 4 overall pick in the 2008 draft.

Brian Matusz, a former pitcher for the Baltimore Orioles, died at the age of 37, the team announced Tuesday. No cause of death was disclosed.

Brian Matusz, who starred at Phoenix St. Mary's, pitched from 2009-16 for the Baltimore Orioles. He was found dead Monday.

The Baltimore Orioles announced Tuesday that former pitcher Brian Matusz died at the age of 37. Matusz, who spent nearly his entire MLB career with

Reports of the death of the professional baseball pitcher Brian Matusz are circulating online and beyond, and people are wondering what happened. Matusz was a Major League Baseball (MLB) player affiliated with the Baltimore Orioles from 2009 to 2016.

Former Baltimore Orioles pitcher Brian Matusz has died, the team announced Tuesday night. He was 37. No cause of death was given. MASN’s Roch Kubatko reported that Matusz died Tuesday morning.

Jen Royle, who was an MLB reporter for 13 years, mourned the stunning death of former Orioles pitcher Brian Matusz on Wednesday with a series of emotional messages on social media. The cause of the 37-year-old Matusz’s death have yet to be determined,