By "expansion" do you mean more planes? Doesn't more planes translate to demand for more pilots, and therefore more lines? So if anything, this will translate to depleting the reserves.
KB can clarify, but I think there is a few more of the stretch 757's to be delivered, maybe not. ( I think there was some lease issues with ATA), but I think it's just more fleet utilization. Since 9/11, Cal has been the slowest to return to full fleet utilization, and that is slowly being reversed. By saying "hammered", means they are flying their fannies off. So yes more hiring. Seems Cal has always been "knee-jerk" to staffing levels. They wait until flights are cancelled due to no crew, then the hiring light bulb comes on. By then, the training department is swamped trying to make up the difference. So I hear new hires are going to the 757/767. Good luck, at least there is some hiring going on.