Identifying deep sleepers can make all the difference in Fantasy because they provide huge return at virtually no cost. In fact, drafting a pitcher whom others slept on can change your entire team's outlook.

That's why your Fantasy baseball draft prep isn't complete until you see Fantasy analyst Jeff Zimmerman's top sleeper pitchers to target late in drafts.

Zimmerman has written at FanGraphs, Hardball Times, RotoWire, ESPN, Baseball America, and Beyond the Boxscore. He has won several FSTA awards including Best Baseball Series and Football Writer of the Year. He's participated in Tout Wars and won it twice (15-mixed auction and 12-team H2H). Along with Tanner Bell, he just published the first edition of "The Process", a complete guide for running your own fantasy baseball start-to-finish.

Now he's studied the upcoming MLB season and has identified the top sleeper pitchers you need to know heading into your drafts. One sleeper who made Zimmerman's list: Padres SP Joey Lucchesi (207 NFBC ADP).

"I'm a little surprised Lucchesi isn't getting more love," Zimmerman said. "He joined just 14 other pitchers who threw 130 innings with a K/9 over 10 and a BB/9 under 3. Only two are going after pick 100 (Rich Hill and Nick Pivetta) while nine are going before pick 50. Few pitchers meet these thresholds, and most are highly prized."

Zimmerman has also identified a pitcher you're not thinking about who will be available at the end of drafts, but has MAJOR upside. You ABSOLUTELY need to see who it is before you draft.

So who are the top sleepers available in 2019 Fantasy baseball drafts? And which undervalued pitcher is a must-add selection in the late rounds? ... Join SportsLine right now to see Jeff Zimmerman's list of undervalued pitchers, all from an award-winning Fantasy baseball analyst who can give you a huge edge in your league!