<Li> Marty Walsh (played by Erik Palladino) is the former coach of The Rock and a three - time Olympic gold medalist . He leaves the club after Steve Tanner blackmails him with information about his affair with Ronnie Cruz . Marty begins coaching at the Denver Elite Gymnastic Club, where his top gymnast is Kelly Parker . Although the National Team trains at The Rock, Marty is named their coach . He is fired from the National Team by Ellen Beals after he tells her to stop bullying Emily during practice . Marty really liked Emily and he cared for all of the gymnasts . He was very sad to leave the Rock but he fibbed and said it was because he liked Denver more which was not true . </Li> <Li> Carter Anderson (played by Zachary Burr Abel) is Kaylie's ex-boyfriend and former gymnast at The Rock, currently training at Denver Elite . He had sex with Lauren, her losing her virginity, after a fight with Kaylie, but did not tell Kaylie about the affair because of fear that she'd break up with him . He later gave Kaylie a necklace that had belonged to his late mother . When his relationship with Kaylie is revealed at a party, he argues with Kaylie's dad about who loves Kaylie more . He stands up for Kaylie - refusing to name the girl he's involved with to Sasha - and is subsequently suspended from the Rock and banned from Nationals . He later reveals his affair with Lauren, causing Kaylie to break up with him . Carter shows great resentment towards Lauren, blaming her for everything that happened between him and Kaylie . However, after being kicked out of his home, he is forced to live in Lauren's attic, and he grows less hostile towards her . He continues to try to win Kaylie back, using it as motivation to get his act back together . The two share a kiss, but Kaylie then discovers that Lauren and Carter are still in contact and that Carter has been living in Lauren's house . He kisses Lauren in the episode "Are We Family". He becomes Lauren's boyfriend after he and Kaylie break up . He breaks up with Lauren after she steals Emily's floor routine where afterwards he tells her that the reason he could never tell her he loves her is because she purposely does things that hurt other people for her own personal gain . When their relationship becomes public, he is kicked out of The Rock and begins training at Denver Elite . </Li> <Li> Nicky Russo (played by Cody Longo) is a former gymnast at The Rock and winner of the men's silver medal at Nationals . He is extremely dedicated to his sport and considers any time not spent working on his routines as time wasted . He has feelings for Payson; he helps her obtain cortisone illegally for her back, and they share a kiss in "California Girls". Nicky's agent hopes to pair him with Kaylie as a "power couple" of gymnastics . First Kaylie and Nicky hated each other . He always did like Payson . Although Nicky and Kaylie share several moments of sexual tension, he eventually decides to move to Denver to escape The Rock drama . </Li> <Li> Kelly Parker (played by Nicole Gale Anderson) is the former National Champion, who trains at Denver Elite . Before Payson's injury, Kelly and Payson were serious rivals . Kelly makes fun of all of The Rock girls, especially Emily . At Nationals, Kelly places second behind Kaylie Cruz . She is the first to notice how dangerously thin Kaylie is becoming and decides to befriend her to learn more about her weight at the time hoping to expose Kaylie's eating disorder, but eventually develops a less hostile relationship with her . She bonds with the girls at the Olympic training center but loses her place for the Olympic team . When her mother, Sheila, makes noise about this being a case of discrimination (since Jordan was kept and is black; the same skin color of the coach) Kelly snaps that she's quitting gymnastics to find a new path in life and "fires" Sheila as her mother . She shows up at the Olympic try outs to support the girls . </Li>

Who plays nicky on make it or break it