This has not been a good week for me. With a test run with more than 1 test case - what date would you want listed? If a test run has 100 cases then what date would you want to see. Really can't list more than the date the run was created on the main Test Run/Results screen.
Once you click into the run however, you can configure the columns shown to be things like Tested By and Tested On. It can get crowded with the 3 pane view though depending on monitor size.