IBF 140-pound titleholder Lamont Peterson and his brother, lightweight Anthony Peterson, have signed with Al Haymon, Haymon associate Sam Watson informed RingTV.com on Friday.

Fighthype.com first reported the news.

The Peterson brothers join an impressive stable of fighters aligned with Haymon including Floyd Mayweather Jr., Danny Garcia, Marcos Maidana, Adrien Broner, Lucas Matthysse, Peter Quillin, Deontay Wilder, Keith Thurman, Shawn Porter, Devon Alexander, Paulie Malignaggi, Luis Collazo and Chad Dawson.

Haymon also has signed 21-year-old lightweight Chris Alexander (4-0, 3 KOs), who is managed by Sharif Salim. Alexander will face an opponent to be determined on the April 19 undercard of the 175-pound unification bout between IBF titleholder Bernard Hopkins and WBA counterpart Beibut Shumenov.

Peterson (31-2-1, 16 knockouts) was last seen in the ring in a January unanimous decision over Dierry Jean. The win helped him rebound from a third-round knockout loss to Matthysse in a non-title bout last May.

Since losing a unanimous decision to current WBO 147-pound beltholder Tim Bradley as a junior welterweight in December of 2009, Peterson is 5-1-1 with three knockout victories.

He won his current belt by split decision from Amir Khan in December 2011 and successfully defended it against Kendall Holt by eighth-round stoppage in February 2013.

The 28-year-old Anthony Peterson (32-1, 21 KOs) will pursue his third straight victory against Marcos Jimenez (20-4, 13 KOs) March 21 on ESPN2's Friday Night Fights.

The younger Peterson last saw action with a second-round stoppage of Dominic Salcido last May that followed a unanimous decision over Daniel Attah in December 2011. Prior to facing Attah, Peterson lost by seventh-round disqualification to Brandon Rios in September 2010.