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 hitters who are widely available entering Week 18. One we'll give away: Chamberlain is high on Orioles third baseman Renato Nunez, who's owned in just 45 percent of leagues.

"Since July 1, Nunez has been his best self in 2019, hitting 4 home runs in just 55 plate appearances with a robust .308/.345/.615 slash line (149 wRC+)," Chamberlain said. "It brings his season line to .246/.307/.502, which, while not eye-popping, is above-average and features a solid 35-homer pace. As the team's designated hitter, Nunez loses out on reps when traveling to National League ballparks, depressing his value slightly. Still, he's more valuable than Chris Davis and could force the Orioles to feature him at first base when the situation calls for it."

Chamberlain has also identified which hitters 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!