Number 4: Casey Weathers
The Rockies drafted Casey Weathers with the 8th overall pick in the 2007 draft. The Rockies used the right-handed pitcher as a reliever throughout his minor league career and he even had a few good seasons, like in 2008 with Double-A Tulsa, when he had an ERA of 3.05 in 44 appearances. He had to have Tommy John surgery, though, which wiped out his 2009 season.
He struggled for much of the next two seasons, never getting higher than Double-A.
Like with Mangum, Weathers didn’t pan out for the Rockies but he actually did pay dividends in another way for the Rockies. The Rockies, after the 2011 season, traded Weathers and Ian Stewart to the Chicago Cubs for Tyler Colvin and some guy named DJ LeMahieu.
Not a good draft pick, but getting DJ LeMahieu out of him? You can’t complain a ton.
Weathers never did get above Double-A and he last played in independent ball in 2017. Before the start of the 2020 season, the Cincinnati Reds hired him as a rehab coach and Arizona League pitching coach.