[1] He played in MLB for the Chicago White Sox, San Diego Padres and Los Angeles Dodgers.

He was found dead from a self-inflicted gunshot at the Grand Canyon on October 3, 2020, shortly after the suspected murder of his ex-girlfriend.

Garland was relieved by Haeger in the fifth inning, marking the first time in recent years that two knuckleballers faced each other in the same game.

He was assigned to the AAA Albuquerque Isotopes, and pitched well enough in the first half of the season to earn a spot on the Pacific Coast League All-Star team.

[9] Haeger signed a minor league contract with the Seattle Mariners in November 2010, and was given an invitation to spring training.

[18] He re-signed with the Red Sox after the season, but he suffered an elbow injury in a long-toss session during spring training.

[21] Haeger was a minor league pitching coordinator for the Tampa Bay Rays organization from 2016 to 2018 and was named as the pitching coach for the Chicago Cubs' AA minor-league team, the Tennessee Smokies in 2020 but never served in the role as the Minor League Baseball season was cancelled due to the COVID-19 pandemic.

[22] On October 3, 2020, Haeger, 37, was found dead from a self-inflicted gunshot wound on a trail along the South Rim of the Grand Canyon.