Sigel shot his second straight 4-under-par 68 Saturday and shared the lead with John Bland after the second round of the NFL Golf Classic.
Winless since the 1998 Kaanapali Classic, Sigel ended an injury-plagued drought last week with a win at the Farmers Charity Classic.
The 58-year-old Sigel underwent surgery on both rotator cuffs in November 2000 and January 2001 and missed the first five months last season. Finally healthy again, he appears to be rounding into form heading into next week's Senior PGA Championship.
Bland has a drought of his own. He has just one top 10 finish this season and has not won a Senior PGA event since capturing four tournaments in 1996. The native of South Africa shot a 69 on Saturday matched Sigel's at 8-under 136.
Dave Eichelberger, who shared the first round lead with club pro James Mason, settled for a 71 on Saturday and was one stroke back at 137.
Eichelberger is 20th on the money list and posted his lone win of the season -- and sixth of his career -- at the Emerald Coast Classic.
Mason turned some heads with a 65 on Friday, but came back to earth with a 73 and was two strokes back at 138. He is a teaching pro from Dillard, Ga., who is playing just his seventh Senior Tour event and second this season.
Bruce Summerhays, Jim Colbert and Dave Barr were three shots off of the pace at 139. Summerhays shot a 68, Colbert a 70 and Barr a 71 on Saturday.
NFL players compete in a separate competition that began Thursday.
Among those failing to advance to Sunday's final round was former Tennessee Titans kicker Al Del Greco, who was seeking his sixth title.
Former Denver Broncos quarterback John Elway shot a 76 Saturday to lead six current and former NFL players into the final round.
UPI horse racing weekend preview
Bo Jackson: I can't help Jameis Winston anymore