Wrap rows that have duplicates

Question

I've got data that looks like this:

BOB  | 4
BOB  | 3
BOB  | 7
MARY | 1
JOE  | 2
JOE  | 1
MIKE | 6

I want to end up with data that looks like this:

BOB  | 4 | 3 | 7
MARY | 1 |   |
JOE  | 2 | 1 |
MIKE | 6 |   |

The problem is, how do I account for the variable number of times a name shows up?