Just got the email so I figured I'd pass the information along... The Yankees have announced start times for the August 11th game against the Tigers and the September 8th game against the Red Sox. Both games, which had previously been listed as TBA, will start at 1:05 PM. I assume they were waiting to see if those games would be on national TV. The start time for their September 21st contest against the World Champion Giants remains TBD.
If you'd like tickets to either game, or any other upcoming game on the schedule, you can buy direct from the Yankees ticket exchange.