Leo is an awesome athlete, competitor and person. To those saying he hasn't been relevant for a while have a pretty short memory. In 2015, at USAs he got Bronze and made the world's team again. That was his 10th time in a row to finish in the top 3 at USA Outdoor Track and Field championships. In 2016, at the Trials, Leo finished 4th just behind Ben Blankenship (who he nudged out in 2016) Meaning he was still relevant as of 2016.
Between 10 consecutive podiums at USAs, 2 Olympic teams, 1 Olympic Medal, and an IAAF Continental Cup Bronze in 2010. He is one of the best 1500 meter runners we have ever had. Much respect.
That said, I think it was actually last year that may have been the beginning of the end. 2017 was the first year that age, and lack of fitness really began to show up with no real silver lining to the season. I worry this year will be the same. I do enjoy watching him continue to fight. That shows courage. Props to Leo for doing what he does, even if he is an older, less competitive version of himself.