I've found a new pass rush statistic on PFF that I find interesting. It's 'Pass Rush Productivity' which is basically the amount of total pressures per 100 pass rushing snaps but placing an emphasis on sacks. But that's not what's interesting right now, but it also shows how many pressures are coming from either the left or right side. It tells you whether a pass rusher is limited to one side or not.
For example:
Rueben Bain has 3 sacks and 22 pressures from the left side. However, he has zero sacks and only 7 pressures from the right side. 64% of his pass rush attempts come from the left, 36% from the right.
Other interesting facts:
Max Llewellyn never rushes from the right side. John Henry Daley of Utah never rushes from the left.
Joshua Josephs is twice as productive rushing from the left as he is the right.
However, there is one man who is almost equally productive rushing from both sides and I'm sorry to be a bore but...
David Bailey rushes from the left 51% of the time and 49% of the time from the right. From the left he has 4 sacks and 22 pressures. From the right he has 5 sacks and 22 pressures. Compare this to Romello Height who has a 53-47 left/right balance but none of his sacks come from the left and he has three times the pressures coming off the right.
So if you have a need for an edge rusher to come off the left, you probably shouldn't draft Romello Height. However, with David Bailey, it doesn't matter one jot, he's equally comfortable from either side.