Junior Lake left Friday's game against the Reds after hitting the second base bag awkwardly when he advanced on a wild pitch.
Cubs recalled OF Junior Lake from Triple-A Iowa.
Cubs optioned OF Junior Lake to Triple-A Iowa.
Junior Lake could be optioned to Triple-A Iowa soon.
Junior Lake fanned all four times he was up Monday against the Red Sox.
Junior Lake returned to the Cubs starting lineup on Saturday, going 0-for-4 with a pair of strikeouts in a losing effort against the Nationals.
Junior Lake (head, leg) is not in Friday's lineup but is available off the bench.
Junior Lake did not show any concussion symptoms Thursday.
Junior Lake left Thursday's game against the Nationals after colliding with the outfield wall.
Junior Lake went 1-for-3 with two runs scored in a win over the Reds on Tuesday.
Junior Lake went 2-for-5 with a stolen base and two runs scored in Tuesday's win over the Pirates.
Junior Lake hit a pair of solo homers Saturday against the Marlins.
Junior Lake went 1-for-3 with a solo home run in Sunday's loss to the Padres.
Junior Lake had a three-run homer, two doubles and six RBI as the Cubs trounced the Cardinals 17-5 on Monday.