Looking at Jays history to estimate the number of starts per available starter including depth starters.
No. of starts by pitcher 2014 - 34, 32, 32, 30, 26, 8, 6, 3, 1
2013 - 34, 33, 20, 18, 16, 14, 10, 6, 4, 3, 2, 1, 1
2012 - 32, 31, 21, 16, 16, 13, 11, 9, 6, 3, 2, 2
2011 - 32, 30, 20, 20, 14, 13, 10, 8, 4, 4, 4, 3
2010 - 32, 31, 28, 26, 12, 9, 9, 5, 4, 3, 3
5Yr Average - 33, 31, 24, 22, 17, 11, 9, 6, 4, 3, 3, 2, 1
MB - 33
RAD - 31
MS - 24
DH - 22
ME - 17
AS - 11
DN - 9
TR - 6
? - 4
? - 3
? - 3
? - 2
? - 1
Of course, it could be MS making 33 starts and MB making 24. The point of the exercise is make a realistic estimate of how many starts your depth starters will make. Going by average, Estrada makes 17 starts, Sanchez 11, Norris 9, Redmond 6, and 5 other pitchers make 13 (Jenkins and journeyman AAAA depth).
So are you comfortable with the depth?
Note that if Happ wasn't traded (good trade) - Estrada has 11 starts instead of 17, and the others all get bumped down.
It's not too bad, but the 17 starts by Estrada (could be more if the injury bug hits), and the combined 20 by Sanchez and Norris make me uncomfortable. Very possibly the difference between postseason and not.
Note the very atypical health of the Jays starting 5 in 2014.