David Buchanan had to be carted off the field after suffering a severe right leg injury on Sunday at Triple-A Lehigh Valley.
Phillies optioned RHP David Buchanan to Triple-A Lehigh Valley.
David Buchanan got shelled for seven earned runs in 4 1/3 innings Thursday in a loss to the Cardinals.
David Buchanan allowed just three runs over 6 2/3 innings against the Braves on Saturday, but his team was unable to lend him enough run support for the victory.
David Buchanan was much improved on Sunday but still fell to 0-3 after allowing three runs in five innings to the Nationals.
David Buchanan's struggles continued in Tuesday's loss to the Mets, allowing five runs in 5 2/3 innings.
David Buchanan was lit up for six runs in three innings by the Red Sox in a loss Thursday.
David Buchanan pitched two-hit ball over five scoreless innings Saturday as the Phillies beat the Pirates 5-5.
David Buchanan blanked the Twins for five innings in the Phillies' 3-0 victory on Monday.
David Buchanan pitched four innings of one-run ball and struck out six Tuesday against the Rays.
David Buchanan pitched three scoreless innings out of the pen Thursday as the Phillies edged a Tigers split-squad 6-5.
David Buchanan gave up a run and five hits over two innings in his start versus the Yankees on Tuesday.
David Buchanan gave up two runs in 5 1/3 innings Thursday in a no-decision against the Marlins.
David Buchanan limited the Marlins to one run over 6 1/3 innings but took a no-decision Sunday.