Finding the perfect addition 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 best hitters who are widely available entering Week 9. One we'll give away: Royals SS Nicky Lopez, who's available in over 70 percent of CBS Sports Leagues.  

"Few hitters, at any level, at any point in time, have ever accomplished what Lopez accomplished at Triple-A this year," Chamberlain said. "In 31 games, Lopez walked four times more often than he struck out. That's a 3.6% strikeout rate and a 14.5% walk rate. Which, it bears repeating, is ridiculous. He was in completely control of the strike zone, swinging and missing just 4.1% of the time and hitting a massive .353/.457/.500.

That's what makes Lopez so appealing: Lopez has little, if any, playing time competition. His primary impediment was Chris Owings, one of baseball's worst hitters through the first quarter of the season. Whit Merrifield's versatility moves him to the outfield, so Lopez can thrive full-time at the keystone."

Chamberlain has also identified which hitters you should target on waivers if you need a jolt for your squad, including an undervalued player who's poised for a breakout. 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!