Tejada had previously tested positive for amphetamines. The penalties for a second and third positive tests are 25 and 80 games, Passan reports. Tejada will likely not appeal the suspension, which comes just days after he was placed on the 60-day disabled list with a calf strain. If it takes effect when expected, he will not be eligible for the first 64 games of the 2014 season.
The two tests -- which came back positive for Adderall, according to Passan -- came in close proximity to one another. This could end the 39-year-old infielder's career. Passan's sources said Tejada is strongly considering retiring. A fourth positive test for amphetamines would result in a lifetime ban.
Tejada spent the 2012 season in the minor leagues before latching on to the Kansas City Royals' roster after spring training. Tejada is batting .288 with three home runs and 20 RBI in 167 plate appearances this season.
Over his career -- which has been marred with off-the-field issues, including confessing to purchasing human growth hormone before claiming to have thrown it away before injecting it -- Tejada is batting .285 with 307 home runs, 1,302 RBI and was named to six All-Star teams.