Finding the perfect additions to your Fantasy baseball team via the waiver wire is the key to winning in any Fantasy league, but if it were easy, anyone could do it. And if you're searching for a hitter to round out your Fantasy baseball lineup, you absolutely need to see what SportsLine's Fantasy expert Alex Chamberlain has to say.

Chamberlain is a 5-time Fantasy Sports Writers Association award finalist and was recognized as 2015's Newcomer of the Year and 2018's Fantasy Baseball Writer of the Year. He competes in Tout Wars and contributes (other) work online at RotoGraphs and in print in Lindy's Sports annual Fantasy Baseball magazines. Previous bylines include Baseball Prospectus and Rotoballer. 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 18. One we'll give away: Chamberlain is high on Cardinals starter Adam Wainwright, who's owned in just 40 percent of leagues.

"Over his first nine starts to the season, he had a 4.75 ERA with ERA estimators to match. Over the last nine starts, his 4.26 ERA garners acceptability," Chamberlain said. "The change comes from him controlling the strike zone. His strikeout-to-walk ratio has increased from 2.1 to 3.0 K/BB. While not elite numbers, his performance merits being rostered in most leagues."

Chamberlain has also identified which pitchers you should target on waivers if you need a jolt for your squad, including another undervalued player who you need to buy low on right now. Anyone who adds this player could hit it BIG.

So which hitters should you target on the waiver wire? And which undervalued hitter 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!