too much high altitude running, I think. Him and his coach never know what kind of times he'll run in a race. He's come down from altitude to run cross country races, which he ran poorly in the past few years. He's also run some 15k races in the spring with hype that he was gunning for an American record and he was no where close. He even had no idea how fast he migh run in his two lead up half marathons this summer/fall. He though he might run 60 mins or 64 mins. These guys run slow miles at high altitude (7000feet plus), and think they can come down to altitude and suddenly run 20 seconds/mile faster. It doesn't always work that way. His big 18 mile tempo at altitude was only at 5 min/mile pace. If that's the FASTEST hre's doing longer runs, it's no wonder he can't hang when someone throws down a 4:35 in the race.
I'm not saying his coach doesn't know anything, but thye've done more high altitude running the past year and a half, and it hasn't worked. Ritz used to run at altitude and it didn't work for his racing in college and just after. Now that he's focusing on speed at sea level, he's taken off. Hall needs a change from slow high altitude jogging.
Joe