Louis William Merloni (born April 6, 1971), nicknamed "Sweet Lou", is an American radio personality and a former Major League Baseball player.

A native of Framingham, Massachusetts, Merloni graduated from Providence College in 1993 and still holds several single-season and career records for the now-defunct Friars baseball team.

Merloni was chosen as the Most Valuable Player in the 2007 Bricktown Showdown, leading the River Cats over the Richmond Braves by a final score of 7–1.

On May 27, 2008, Merloni joined the New England Sports Network (NESN) as a commentator on the Red Sox pre-game and post-game shows.

[8][9] In 2013, Merloni began serving as a part-time color analyst on the Boston Red Sox Radio Network, teaming with play-by-play announcers Joe Castiglione and Dave O'Brien for select games.

In September 2015, Glenn Ordway joined Merloni and Fauria at WEEI for the station's mid-day program; the show moved to the afternoon drive time in July 2018.

[12] During an appearance May 9, 2009, on WEEI's The Baseball Show, Merloni claimed that the Red Sox organization had a doctor brief the players during spring training on how to correctly use steroids.

Merloni's claim was quickly refuted by former Red Sox General Manager Dan Duquette who stated "It's ridiculous.

Former Red Sox player Troy O'Leary was interviewed and stated he didn't remember the incident.

"[13] Merloni's account was confirmed with former major league pitcher John Rocker who previously stated that a doctor hired by the Major League Baseball Players Association told Alex Rodriguez, Iván Rodríguez, Rafael Palmeiro and him how to use steroids after a spring training lecture in 2002.