Santana - Dingers at home
2011 - Angels - 14 (PF -5%)
2012 - Angels - 17 (PF -5%)
2013 - Royals - 18 (PF -6%)
Blue Jays PF - Santana's hypothetically-dingers
2011 - +7% = 14 + (5+7)% = ~16
2012 - +7% = 17 + (5+7)% = ~20
2013 - +7% = 18 + (6+7)% = ~21
Knowing that Bos, Yanks, O's and Tor are parks prone to dingers, Santana could easily allow 40-45 dingers per season.