Lewis Stevenson rejoins Exeter from Ulster to reinforce second row

• Irish lock, 31, returns after five years at Ulster• ‘Since I’ve left Exeter have established themselves as a real force’The Irish lock Lewis Stevenson has rejoined Exeter until the end of the season. The 31-year-old returns to Sandy Park from Ulster, where he has played since 2011 following a two-year stint with Harlequins.Larne-born Stevenson spent two years at Exeter between 2007 and 2009 and returns with the Premiership title chasers having suffered injuries in the second row to Damian Welch and Mitch Lees. Related: Exeter’s late tries against Ospreys take them to a thrilling new frontier…