Lincecum, a four-time All-Star, has been rehabbing his hip in Arizona. He had surgery on it in September 2015.
He pitched last season with the San Francisco Giants, making 15 starts before his ailment. In those appearances, Lincecum went 7-4 with a 4.13 ERA and a 60 to 38 strikeout-to-walk ratio in 76 1/3 innings pitched.
According to FanGraphs, Lincecum was worth 0.3 Wins Above Replacement and posted a 4.29 FIP and a 4.64 xFIP.
According to Heyman, the Giants, San Diego Padres, and Baltimore Orioles will be among the approximately 20 teams to attend his showcase.
Heyman had previously reported that the Giants would be interested in Lincecum in the past, but only as a reliever, with the starting rotation being a strength for the team.
The teams that will be at Lincecum's showcase will want to see if he still has anything left in him. Not only a four-time All-Star, Lincecum also won back-to-back NL Cy Young awards in 2008 and 2009 as one of the best young starters in the game.
During a four-year stretch from 2008 to 2011, the now-31-year-old Lincecum posted a 2.81 ERA and 977 to 314 strikeout-to-walk ratio in 881 2/3 innings pitched.
Since, Lincecum has not been the same, losing life on his fastball that once could reach the 98 to 99 mile per hour (mph) mark. His strikeout rate has gone with it, and he has a 4.68 ERA in the past four seasons.