Uber-jock, A.C. Slater was Zack&#39;s main &#39;frenemy&#39; and played by Mario Lopez. Slater would alternate between roles as Zack&#39;s co-conspirator and his competition for Kelly&#39;s affections. Following &#39;Saved by the Bell&#39; Lopez appeared on the television series &#39;Pacific Blue.&#39;  Lopez&#39;s real way back into the limelight was ABC&#39;s &#39;Dancing With The Stars&#39; when he and Karina Smirnoff finished second to former Dallas Cowboys star Emmitt Smith and his professional partner, Cheryl Burke.  Following his gig on &#39;DWTS,&#39; Lopez went on to appear and host a variety of shows including &#39;Entertainment Tonight,&#39; &#39;Ellen: The Ellen DeGeneres Show,&#39; &#39;Live with Regis and Kelly,&#39; and &#39;The Wendy Williams Show.&#39; Today, Lopez is the host of the syndicated entertainment news show &#39;Extra&#39; and &#39;The X Factor&#39; on FOX. He married Ali Landry on April 24, 2004 and got annulled less than a month later. Lopez&#39;s current girlfriend, Courtney Mazza, gave birth to a girl, Gia Francesca Lopez on Sept. 11, 2010 in Burbank, Calif. The couple welcomed second child, a son named Dominic, in September 2013.  <span class=meta>(NBC Productions&#47;NBC Universal)</span>