Michael Roeger
1500m progression
Table:
Distance

Time /
Distance

Location

Date

1500m
3:51.08
Melbourne
20 March 2014

1500m
3:50.61
Sydney
19 March 2015

1500m
3:48.55
Boston
June 2015

1500m
3:49.08
Portland
12 June 2016

1500m
3:46.51
Ratified World Record[28]
Sydney
4 February 2017

1500m
3:45.63 [29]
Sydney
17 March 2018

Looking at the data table for 'Michael Roeger', section '1500m progression', produce a single-sentence summary focused on the highlighted cells and provide it inside the JSON object {"answer": "YOUR ANSWER"}.