Is there any indication he's live or does he sound canned today? Can't imagine the boss regularly pulling a seven day week. (Unless he's taking all of next week off, for whatever reason.)
Assume he was live yesterday, and live today, and then does his normal Monday-to-Friday. That's a 12 day stretch, plus he's got all his other, off-the-air duties. That's a burnout schedule. Many of us have had to pull a schedule like that in a crunch, but combined with an AM Drive air shift he's not going to sound very energetic on air for long.
Back when WOR-FM, and then WNEW-FM, launched back in the '60s, the air staff routinely were heard 7 days a week. But they also pre-taped two of those shows, so they really were only working five actual days each week. You could spread out the recording sessions over the other 5 days so it wasn't onerous. But those guys also weren't the program director. (Except, eventually, Scott Muni at 'NEW, but by then they had enough staff not to need the "five live, two taped" schedule anymore.) But that's sixty freakin' years ago and it's a different world.