Lachlan McCaffrey and Peter Betham return to the Leicester Tigers team for Friday's Aviva Premiership Round 16 fixture away to Harlequins.Back-rower McCaffrey has sat out the last four games but returns to line up alongside Brendon O’Connor and Mike Fitzgerald for the trip to The Twickenham Stoop.Betham is in line for his 50Tigers appearance, just 16 months after his debut, and joins Maxime Mermoz at centre.There are changes in the front row, with starts for Ellis Genge , George McGuigan and Greg Bateman , while Harry Wells is brought in for his first start in the Aviva Premiership this season in the second row. Dom Barrow is named as captain for the first time on league duty.Tigers head coach Aaron Mauger said: “We’re happy with the improved performances in the last couple of weeks but there are still things to grow. The guys had their feet firmly on the ground in our reviews on Monday, we know there are things we want to tidy up but also there are some good things coming from what we have been working on during the week.”15 Telusa Veainu 14 Adam Thompstone 13 Peter Betham12 Maxime Mermoz11 J P Pietersen10 Freddie Burns9 Sam Harrison1 Ellis Genge2 George McGuigan3 Greg Bateman4 Harry Wells5 Dom Barrow (c)6 Mike Fitzgerald7 Brendon O'Connor8 Lachlan McCaffrey16 Tom Youngs 17 Riccardo Brugnara18 Pat Cilliers19 Mike Williams20 Luke Hamilton21 Jono Kitto22 Owen Williams23 Matt Smith15 Aaron Morris, 14 Marland Yarde, 13 Joe Marchant, 12 Matt Hopper, 11 Alofa Alofa, 10 Nick Evans, 9 Charlie Mulchrone; 1 Mark Lambert, 2 Rob Buchanan, 3 Adam Jones, 4 George Merrick, 5 Charlie Matthews, 6 James Chisholm, 7 Dave Ward (c), 8 Mat Luamanu16 Joe Gray, 17 Owen Evans, 18 Matt Shields, 19 Stan South, 20 George Naoupu, 21 Luc Jones, 22 Ruaridh Jackson, 23 Charlie Walker