Prior to the start of the 2018 season, Raisel Iglesias had allowed just 12 dingers in his previous 159.1 IP. That covered his final start of the 2015 season as well as a two-year window in which he pitched on Opening Day, experienced enough arm fatigue to move full-time to the bullpen, took over as the team’s closer, and pitched to a dominant 175 ERA+. This, mind you, while the Reds pitching staff as a whole was largely abysmal, leaving Igloo as the lone true dependable arm on which they could continually lean.
A rudimentary glance at the back of his baseball card will show that his 2018 season actuall featured an improvement in his ERA, as he posted a career-best 2.