In corresponding moves, Washington recalled outfielder Kory Casto and selected the contract of infielder D'Angelo Jimenez from Triple-A Columbus.
Logan's foot injury occurred in Monday's game against the Marlins. With one out in the top of the fourth inning, Marlins second baseman Dan Uggla hit a deep fly ball to straight away center field. Logan was able to get a bead on it and caught the ball, but his foot was stuck under the wall. Logan then started hobbling and sat on the ground. Right fielder Austin Kearns, manager Manny Acta and trainer Lee Kuntz then came to Logan's aid.
"I hyperextended my foot. My toes were pressing against the wall. I put all my weight going that way," Logan said. "I tried to make a play and made a play. Unfortunately, I hurt myself on the play. The foot just bent all the way back."
Kuntz wanted to bring a cart on the field, but Logan refused. A few minutes later, Logan was able get up, but Kuntz had to help Logan off the field. Initial X-rays were negative. Later in the day, Logan had an MRI, which confirmed the left foot strain. Logan is expected to miss two to three weeks.
Logan was seen in the locker room on Tuesday afternoon with crutches and a stabilizing boot. Logan had a hunch that he was going on the DL when he woke up on Tuesday morning and saw that the foot had swelled.
"It looks like a pregnant lady's foot," Logan said. "Once the swelling goes down, we'll know a little bit more about it. Now, it's puffed up. I can't do much about it, but put ice on it."
With Logan out, it means that Casto will be the regular left fielder, while Ryan Church moves over to center. The team was impressed with the way Casto was patient at the plate and could play left field, right field, third and first base very well. He hit .280 with seven walks in 22 Spring Training games.
Casto was the last cut of Spring Training because Church and outfielder Chris Snelling were out of options. The only way Casto would have made the Opening Day roster was if Logan started the season on the disabled list. On March 24, Logan suffered a strained right groin and was expected to be out two weeks, but he was back on the field in five days.
Casto played in the Nationals' last exhibition in Washington and then drove to Columbus on Sunday.
Casto knew about Logan's latest injury on Monday evening, but didn't get the call from general manager Jim Bowden until Tuesday morning. In order to make Tuesday's game, Casto flew on the Clippers' private jet. Had he stayed in Columbus, Casto's first Minor League game would have been on Thursday.
"I love Kory. He is a great kid, special kid. Fans will love Kory Casto because he plays the game the right way, a gamer. He has a big heart," Bowden said.
Casto arrived on the field at Robert F. Kennedy Stadium 5:04 p.m. ET, in time for the last round of batting practice. He was in the starting lineup, hitting second against the Marlins.
"One of goals in life is going to be accomplished today," Casto said. "Jim called me and said I'll be starting in left field. With Nook out and Church needing to play center. They need somebody to play left."
As for Guzman, he is expected to miss two to three weeks because of his hamstring problem. On a 1-0 pitch in the bottom of the fifth inning, Guzman hit a ground ball to third baseman Miguel Cabrera. Guzman was seen limping toward first base. Guzman jogged to first base and received a round of boos from the fans, who didn't realize Guzman was seriously hurt.
An MRI revealed that Guzman has a Grade 1 hamstring strain, meaning that there isn't a tear.
Guzman's absence means that second baseman Felipe Lopez will switch to shortstop, while Ronnie Belliard will be the starting second baseman. Josh Wilson started Tuesday's game at short, while Lopez was practicing at the position during batting practice.
Lopez said he is willing to play the position as long as it's for a long period of time.
"If it's for a while and the team really needs it, I'll be happy to move back. It's a position I play naturally. I just have to work hard," Lopez said.
Jimenez, who will be a backup infielder, played in 19 Spring Training games and went 11-for-43 (.256), but he was shaky with the glove, making a team-high five errors.
Bill Ladson is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.