Our fantasy baseball waiver wire column takes a look at players available in many leagues that could have an immediate impact on your fantasy roster, or simply just players to keep on your radar. Let’s take a look some of the top waiver wire pickups heading into Week 5 of the MLB season. If you have any questions on who to pick up or who to drop, feel free to post them in our Fantasy Baseball Forum.

Add in all leagues

Chris Colabello MIN | 1B/OF

Colabello isn’t the youngest up and comer in the league, but he is certainly making a name for himself. He is currently leading the league with 26 RBIs and his average is close to .350. Clearly he is going to trail off to some degree, but there is a decent chance that he remains fantasy relevant for the rest of the season. (about 70% owned)

Jesse Chavez OAK | SP

I don’t totally believe what Chavez has done so far this year, although it’s hard to ignore his numbers. He has a sub 2 ERA, over a strikeout per inning and he only has 5 walks in 26 innings of work. The 30 year old pitcher hasn’t done much during his career, but he needs to be owned in more leagues in case he keeps up this pace. (about 70% owned)

Devin Mesoraco CIN | C

In limited at bats this year Mesoraco has been nothing short of amazing. He has hit for power and average and at this point he should be owned in all leagues. Catcher is a shallow position so you should always be keeping a close eye on the wire for any potential adds. (about 70% owned)

Justin Morneau COL | 1B

Morneau is a little longer in the tooth these days, but I still think he can put up huge numbers. He has been banged up over the last few years and his production has reflected that. He appears to be healthy right now and if he can stay healthy I think he can keep up these amazing numbers. (about 75% owned)

Travis Wood CHC | SP

Considering that Travis Wood is a pretty well known name in fantasy, it’s surprising to see how many leagues he is still available in. He is off to a scorching start in 2014, with over a K per inning, a sub 3 ERA and only 4 walks in 25 innings of work. I am not sure why he hasn’t been added in more leagues, but I can all but guarantee he will not hang out on waiver wires for much longer. (about 55% owned)

Scooter Gennett MIL | 2B

Scooter was a guy that we liked heading into the season and he is playing great. He beat out Weeks to win the starting second baseman job and his fantasy potential is huge. I was shocked to see that he wasn’t owned in more leagues and I think it’s time for owners to start picking him up. (about 10% owned)

Add in deeper leagues

Joe Smith LAA | RP

Frieri isn’t exactly having the season that we expected he would and at this point it looks like Smith is going to take over as the Angles closer. Overall there isn’t a huge upside with Smith though, he has been in the league since 2007 and his numbers have typically just been slightly above average. He could be a nice source of cheap saves though if you need help in that category. (about 20% owned)

Martín Pérez TEX | SP

Perez is off to an amazing start this year and even though his strikeout totals aren’t that great, I still think he is worth a look in most leagues. He is still young, so the potential for finding some more strikeouts is there. I do think Perez will come back down to earth a bit at some point, but you might want to consider riding out this hot streak. (about 45% owned)

Dayan Viciedo CWS | OF

It’s surprising to me the lack of love that Viciedo gets in the fantasy world. He is a young extremely talented player, but for some reason he doesn’t have the same hype around him as some of the other big name young talents. It’s only a matter of time before this kid really starts making a name for himself and I think this could be the year that he breaks out. (about 15% owned)

Jenrry Mejía NYM | SP

Mejía was on the keep an eye on list in my last waiver wire write up, but at this point he needs to be owned in more leagues. He has some impressive stuff and if he can get his walks under control, he could be an amazing fantasy pitcher. If you are looking for a wild card high upside young pitcher, than look no further. (about 35% owned)

Keep an eye on

Dylan Bundy BAL | SP

At this point I am sure you have heard this kids name and for good reason. He is one of the biggest prospects in the game and all signs are pointing to him maybe having an impact during the second half of the season. The Orioles are going to baby their young superstar, but he needs to have the attention of the fantasy world because of his overall talent level. (about 5% owned)

Grégory Polanco PIT | OF

Polanco is one of the best prospects in the game and he is off to an amazing start in the minors so far in 2014. It’s only a matter of time before he gets called up. If you are in any type of keeper or dynasty league then you need to snag him now before it’s too late. (about 15% owned)