text: Scot Knox carded a three-under-par 67 - matching his first-round score - to finish one shot off the lead.
  Englishman Casey also shot 67 and is among six players at five under par.
  Tyrone van Aswegen produced a four-under-par 66 to share the lead with Daniel Berger, Russell Henley and Marc Leishman at seven under.
  South African Van Aswegen, 34, is looking for his first victory on the PGA Tour.
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  Casey, 39, lost in the play-off in Connecticut last year and is level with former world number one Vijay Singh on the leaderboard.
  American Bubba Watson chose to defend his Travelers Championship title prior to his appearance at the Rio Olympics and finds himself four shots off the lead and tied for 24th.
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target: Britain's Russell Knox and Paul Casey are tied second and third respectively after the second round of the Travelers Championship in Cromwell, USA.