Masahiro Tanaka pitched seven innings in his Yankees debut, allowing two earned runs and striking out eight. Toronto’s Melky Cabrera, the first hitter he faced, hit a home run.Credit...Nathan Denette/The Canadian Press, via Associated Press TORONTO — Three pitches into Masahiro Tanaka’s major league career, one thing was clear on Friday. As good as he may be, and as much faith as the Yankees had i