Delays Thursday meant many players had to finish their first rounds Friday. That rippled through second-round play and about half the field is yet to complete the second round.
Dodd and Siem, who started at No. 9 for the second round, are in that category. Dodd is 6-under-par through 13 holes and 8-under for the tournament. Siem, who was tied with Simon Dyson for the first-round lead, is 3-under after 11 second-round holes and also 8-under.
Shiv Kapur, who turned in a 3-under 67 for the second round, owns the clubhouse lead at 7-under 133.
Dyson, 1-under through 11 holes in the second round, is at 6-under. James Kingston (68 in the second round) and Gary Orr (66) are at 6-under after 36 holes.
Siem had two birdies and an eagle -- at the 499-yard, par 5 18th hole -- against one bogey in his second round.
Dodd is bogey-free in the second round. He had an eagle at the 12th hole -- a 484-yard par 5 -- and birdies at 9, 15, 17 and 18.