Sometimes injuries are straightforward and easy to explain (like falling down the stairs at the Masters). Sometimes they are not, like on Tuesday when Jimmy Walker revealed that he has Lyme Disease.

Walker has been plagued for months by lethargy and a dampened enthusiasm, and his game has shown it. He just one top 10 on the 2016-17 PGA Tour season, and that was in the tiny field event at the Tournament of Champions to start the calendar year when he finished T9. On Wednesday at the Valero Texas Open, he opened up about his fight with a disease he did not see coming. 

"I actually tested positive for Lyme Disease, found that out Wednesday of Augusta," Walker said. "So we've been talking to a lot of doctors. I think that was more of what was going on as opposed to the mono, and a lot of doctors think that wasn't really anything that was going on. Been very tired and fatigued and no strength and it comes and goes in waves and just hasn't been real fun.

"So, dealing with that and I think I've had it for, you know, a little while now. I haven't felt really good since Thanksgiving. I'm holding strong to that. How long I've had it, I don't know. I know I haven't felt great since about then. So, been talking to some doctors, trying to figure out the course of action to take and get on some meds to get it going in the right direction."

Walker also noted that he probably needs rest but doesn't want to take it.

"Anybody knows me, rest isn't something I'm really good at doing," Walker said. "Even when ... we thought it was something else, it was still tough but I ... kind of accepted that this is how I've been feeling and I've been feeling like this for awhile now and I keep plugging along, keep going.

"I didn't know anything was wrong. I finally got to a point something is wrong, I don't feel good and I need to get something figured out. Basically feels like you got the flu. No strength. Just got nothing. And it comes and goes in waves. You never know when it's going to pop up.

"Augusta week I felt like I had a pretty good week. I felt nice and solid all week. Anti-inflammatories like Advil, kind of kick some of the symptoms a little bit. I had a really rough week at Honda. But it just comes and goes. I can't figure any rhyme or reason out. I'm ready to get over it. I know that."

Walker did say he's not blaming his poor performance (relative to how he's played in recent seasons) to the symptoms, but it's hard to not draw the through line for him.

"I feel like I try to stay in pretty good shape and relatively healthy but it just -- it's just not a fun way to live," said Walker. "It's hard to describe. I don't know if anybody that's got it can really describe it to you but it's just -- it's not fun. It puts you in a bad mood. You don't feel good. You feel awful like a lot. It's not just fun.

"I'm ready to get back to having full energy and feeling good and the -- play with my kids the way they want to play and not go home and just feel like just a rock. I'm ready to get going. I'm not blaming anything on golf or the way I felt on golf. I go out and give it all I got and I've been practicing and giving it everything I can give it ..."

Walker finished T18 at the Masters and won the Texas Open two years ago by four strokes over Jordan Spieth. His wife, rightfully, called out everybody more worried about their fantasy teams than his health after the announcement.