Another shaky performance Thursday proved costly to St. Louis Cardinals reliever Mitchell Boggs.
Boggs on Friday was optioned to Class AAA Memphis after going 0-2 with a 12.66 ERA in 14 games and 10 2/3 innings.
Boggs was anointed the team's closer in the wake of the spring training elbow injury for Jason Motte, but he didn't take to the role, converting just two of four save opportunities.
The contract of highly touted prospect Carlos Martinez, 21, was purchased and Martinez will be in uniform when the Cardinals play in Milwaukee on Friday. He will wear No. 62.
To make room on the 40-man roster for Martinez, the Cardinals moved shortstop Rafael Furcal from the 15-day disabled list to the 60-day disabled list. Furcal is out for the season after undergoing Tommy John surgery.
Martinez, who missed all of spring training after experiencing visa issues in his native Dominican Republic, is 1-0 with a 2.31 ERA in three starts at Class AA Springfield. He has walked one and struck out nine in 11 2/3 innings.
Martinez is rated the third-best prospect in the Cardinals' minor-league system by Baseball America and was recognized for having the organization's best curveball. He is 16-12 with a 2.74 ERA in 55 career minor-league games, 54 of them starts.
Boggs, who issued walks to the only two batters he faced Thursday in the Cardinals' 6-5 victory, allowed 17 hits and walked 12, permitting 15 earned runs and an opponents' batting average of .362.
In another move, the Cardinals announced that first baseman Matt Adams will begin a minor-league rehab assignment Friday night in Springfield. Adams is expected to play two games in Springfield and two more in Memphis before rejoining the Cardinals before their game Tuesday against the Chicago Cubs at Wrigley Field.