Strop had 126 MLB innings pitched over 4.5 seasons before coming to the Cubs including an all star caliber season with Baltimore in 2012 Am I having the ultimate brain fart on Marshall or did you mean Sean Marshall who had been with the Cubs since 2006 and was traded before he ever played a game under Theo? Rondon is a good call and now that I’m thinking obviously their greatest development was getting Jake into a cy young pitcher. But overall the track record isn’t great at all imo I didn’t realize Pedro was decent for a year or two before coming over, I thought he was bad like Jake. But I guess they identified him. I meant Sean Marshall and Theo traded him, did he not? After they turned him in to a bullpen arm full time and he was successful? But yeah the overall track record isn’t great but he’s always built decent pens once they tried to win starting in 2015. 2015-19 Cubs relievers have the 11 most WAR, 3rd lowest ERA, 8th lowest FIP, 7th lowest xFIP. No Marshall was traded in 2011, the offseason that Theo took over, so he never actually played under Theo. You are right though about the overall success of the pen. It just seems like we have so many guys that come up from the minors and have horrific troubles throwing strikes.