All this stuff is so confusing that it prevents getting an exact fix on the situation, but if I were forced to guess, I'd say Sieber's been engaged as the alternate for when Mann has other commitments (shades of Ben Vereen and Carl Anderson alternating in JCS after Ben developed throat polyps). But it's not a consistent enough schedule, or billing, to say that's what's going on for sure.
Formerly gvendo2005
Broadway Legend
joined: 5/1/05
Blocked: After Eight, suestorm, david_fick, emlodik, lovebwy, Dave28282, joevitus, BorisTomashevsky, Seb28
Updated On: 1/29/14 at 02:44 PM