The leading North American-based sires of Grade l winners this year are Quality Road (five), War Front (four), and English Channel (four). The latter might seem out of place among the other two, but he's a successful stallion at Calumet Farm who's flown under the radar for a long time, and his time in the sun might be now. Within a span of 20 minutes last Saturday, for example, three sons of English Channel (Smart Strike--Belva, by Theatrical {Ire}) won a maiden special weight, a listed stakes race, and a...