JJ McCarthy season stats in 9 starts:
1,744 passing yards, 69% completion, 8.2 Yard AVG, 14 TD vs 2 INT, 157.6 QB Rating, 79.5 ESPN QBR (11th highest QBR in nation), 195 rushing yards, and 3 Rush TD.
JJ has thrown 1 less TD in 9 starts than Cade threw last season in 14 starts. Cade: 15 TD passes in 14 starts, JJ: 14 TD passes in 9 starts. JJ has rushed for 3 TD's in 9 starts, Cade ran for 1 in 14 starts last year. JJ's completion % is 5 % higher (69% vs 64%), his QB Rating is roughly 16 points higher, and his ESPN QBR is 5 points higher.
Andrew Luck's college stats his first year starting were very similar to JJ's- only to explode in his second year. Not saying JJ is Andrew Luck or will be that- am saying that Jim Harbaugh doesn't trust first time starting QBs very much and is super conservative.