Harrington and Clarke in touch as Langer leads the way at US Senior Open

The Irish pair are just outside the top 10. 

ON FORM: Pádraig Harrington is out to defend his title. Picture:  Ross Kinnaird/Getty Images

Irish duo Pádraig Harrington and Darren Clarke are both in a tie for 12th after the second round at SentryWorld in the U.S. Senior Open. 

Bernhard Langer has been able to avoid most of the trouble and leads the way. He still was far from unscathed Friday in a 3-under 68 that gave him the second-round lead.