The Pirates announced Sunday that Hartlieb is included in their initial 60-man roster pool, Adam Berry of MLB.com reports.
Thanks to the expanded roster for the 60-game season, Hartlieb will stick around with the big club in 2020 after he was initially optioned to Triple-A Indianapolis on March 20. Over 29 appearances out of the Pittsburgh bullpen in 2019, Hartlieb posted a 9.00 ERA, 2.00 WHIP and 38:18 K:BB in 35 innings.