Gilliam passed on interest from pro teams in high school, blossoming into a top college closer at the University of Clemson. He was the Mets’ fifth-round pick three years later, the type of advanced ‘pen arm that can move quickly through a system. A short, athletic 5-foot-10, Gilliam generates velocity and high spin on his curveball by way of a very fast arm. The fastball touches 96-97 mph but has worked in the 92-to-94 mph range in 2019, likely an attempt to better control the zone after consistently high walk rates early in his career. His go-to secondary is a hard curve in the upper-70s that shows the power and sharpness of a potentially above-average pitch. If Gilliam starts to control his fastball while simultaneously getting back to the 95-to-97 mph range, the breaking ball is enough of a swing-and-miss weapon to fit in setup situations. Even if not, Gilliam’s solid two-pitch mix is advanced enough to push for middle relief innings as early as next season.