regex expert needed

Hi this is a very small project where i would need some help on regular expression. I have a file ( attached below) and i would need to filter out all lines where second column ( after the comma) is not an integer.
That is Obama, 140 should be selected but Obama, "Retired" should not. I tried:
grep -v [,][A-Z]?[,\s][A-Z]?[,][\"][A-Z]?[-][0-9] tmp2.txt
but can not find correct regular expression.