Brian Matusz, described as the most accomplished pitcher in University of San Diego baseball history, has died. He was 37.

Baltimore took Matusz with the fourth overall pick in the 2008 draft out of the University of San Diego and he made his major league debut a year later.

"The Orioles drafted Matusz with the fourth overall pick in 2008 out of San Diego.“Brian was one of the best players to ever wear a Torero uniform,” San Diego coach Brock Ungricht said.

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.

Ex-Orioles pitcher Brian Matusz, 2005 Arizona player of the year, was found dead on Jan. 6. A report Tuesday said he likely died from a drug overdose.

Former Baltimore Orioles pitcher Brian Matusz died last week from a likely drug overdose, according to a Phoenix Police Department report. He was 37.

Former MLB pitcher Brian Matusz, who passed away on January 6, died from a suspected drug overdose, according to a report from the Phoenix Police Department that was obtained by The Baltimore Banner. Matusz, who was 37, spent the majority of his eight-year career with the Baltimore Orioles.

Former Orioles and Cubs pitcher Brian Matusz likely died from a drug overdose, according to a police report.

The death of former Orioles and Cubs pitcher Brian Matusz stunned many in and around Major League Baseball last week; his cause of death has now been revealed.

Former MLB pitcher Brian Matusz reportedly died of a drug overdose in Arizona ... Colorado native in the first round of the 2008 MLB Draft out of the University of San Diego. He made his major league debut in August 2009 against the Detroit Tigers, going ...

His mother told police that Brian, 37, had a history of drug abuse and recently made comments like “there is nothing left for me.”