The weights are in and the Devon Alexander-Andriy Kotelnik card for Saturday night in St. Louis is ready to go. But as much as we played up how important Alexander's fight is, the undercards are just as intriguing.

A quick reminder for everyone that the card is on regular HBO, not PPV.

The main undercard features two fighters on opposite ends of the boxing spectrum. Glen "Road Warrior" Johnson (50-13-2, 34 KOs) will take on young contender Tavoris "Thunder" Cloud in a 12-round light heavyweight bout. Cloud (20-0, 18 KOs) has been impressive and is the reigning IBF light heavyweight champ. 

It's a big fight for both fighters. Cloud could make his presence felt with a good showing on HBO. For Johnson, it's another chance to solidify his career. Johnson, who has fought everyone worth mentioning, including Roy Jones Jr., Chad Dawson, Antonio Tarver and Bernard Hopkins, is one of the most respected fighters of this era. Expect a good showing from both boxers. 

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IBF junior middleweight champ Cory "Next Generation Spinks (37-5, 11 KOs) will take on Cornelius "K9" Bundrage (29-4, 17 KOs). Spinks has been flying under the radar lately after dropping bouts to Verno Phillips and Jermain Taylor. Bundrage, the No.2 IBF 154-pound contender, should be a good test for Spinks, who needs a win to stay relevant.

 Check back here Saturday night for periodic fight updates.