One of the toughest things to do in Fantasy leagues these days is finding enough saves. As you build your team this season, you need to know who to target in the ninth inning, and MLB Fantasy expert Paul Mammino can help you out. 

As a former college pitcher who graduated with a degree in mathematics and went on to get a master's degree in business intelligence and analytics, Mammino brings a unique perspective to Fantasy analysis. He has written for a number of different sites covering Fantasy baseball after he became interested in quantifying the skills necessary for relievers to succeed in high leverage roles, presenting his research at Saberseminar in 2017. 

And now that research is available for SportsLine users. Paul's new metric can help identify which closer you can bank on and which ones could be out of a job sooner than later.

One thing we can tell you: Mammino says to keep an eye on the Brewers and closer Jeremy Jeffress, because data indicates that manager Craig Counsell won't hesitate to replace him if needed. 

"The Brewers rode their horse Josh Hader to this elite ranking, but Craig Counsell gets a lot of credit for removing a struggling Corey Knebel from the closer role and replacing him with Jeremy Jeffress," Mammimo said. "Counsell appears willing to make rapid moves to replace struggling arms, so if Jeffress struggles when returning from injury you should see another name emerge rather quickly."

The metric also identifies other sleepers to target, plus big names who could pitch their way out of a job in 2019. Avoiding those landmines could be the difference between winning your league and missing the playoffs altogether.

So which closers can you count on? And which team could be close to making a switch? ... Join SportsLine right now to see Paul Mammino's proprietary bullpen management rankings, all from a Fantasy baseball expert who can give you a huge edge in your league!