Finding the perfect pitcher to add to your Fantasy baseball team can be the difference between winning your league or going home with nothing. And before you determine which low-owned pitchers you should target, and which you should avoid, heading into Week 19, you absolutely need to see what Fantasy analyst Jeff Zimmerman has to say.

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. If there's anybody who knows what it takes to win a league, it's him.

Now, he's done an in-depth analysis of the top pitchers who are widely available entering Week 19. One we'll give away: Zimmerman is high on Orioles stater Asher Wojciechowski, who's owned in just 20 percent of leagues.

"If he was 25 instead of 30-years-old, he'd be universally owned," Zimmerman said. "With the lack of good starting pitching, he needs to be owned in all formats. There are no smoke-and-mirrors going on with him. His ERA estimators are a bit higher than his actual ERA because of his flyball (29% GB%) nature. Even so, his SIERA is almost identical to his ERA (3.60 vs 3.65)."

Zimmerman has also identified which pitchers you should target on waivers if you need a jolt for your squad, including another undervalued player he calls a "must add." Anyone who adds this player could hit it BIG.

So which hitters should you target on the waiver wire? And which undervalued pitcher is a must-add selection? ... Join SportsLine right now to see the best league-winning free agents, all from one of the most respected voices in the industry!