At UFC 63 Swick beat former title challenger David Loiseau via unanimous decision, where he suffered a hand injury found out to be ligament damage. Swick's first UFC defeat came at UFC 69, losing by unanimous decision to Japanese middleweight Yushin Okami. He had Okami noticeably rattled toward the end of the second round with a flurry of punches, but ultimately succumbed to Okami's superior wrestling and physical presence, as he was took down comfortably and suffered an onslaught of ground and pound for the majority of the fight.
Chris Leben was asked to fight Mike Swick for the second time on UFC Fight Night 11 (the two had previously met in the WEC, where Leben handed Swick his only KO loss to date) for the main event, on any weight class of his choosing but Leben turned down the fight. Swick then was scheduled to fight Jonathan Goulet but withdrew from the fight on September 2nd due to a rib injury. Swick headlined UFC Fight Night 12 making his welterweight debut, where he defeated Josh Burkman via majority decision.[1]
Swick defeated Marcus Davis at UFC 85 on June 7th, 2008 where he controlled the fight displaying disciplined striking skills en route to a unanimous decision victory.
Swick then went on to fight and defeat Jonathan Goulet at the UFC: Fight for the Troops (Ultimate Fight Night 16) by KO in 33 seconds into the first round on December 10th, 2008. He opened up with a characteristically aggressive flurry of punches, where Goulet was caught and knocked out before he hit the ground, Swick followed up with strikes on the floor untill the referee swiftly stopped the fight.
Swick will next take on TUF 6 alum Ben Saunders (fighter) at UFC 99.