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 3 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.

Must add in all leagues

Miguel Castro TOR | RP

Castro took over for Brett Cecil for the Blue Jays closer role and as long as he pitches well he should hold onto the gig. It was shocking that the Blue Jays didn’t give Cecil more of a chance, but the plan all along may have been to move Castro into the role. The young Dominican has some good stuff and is certainly worthy of a roster spot. (about 55% owned)

Adam Ottavino COL | RP

The Rockies finally gave up on old man LaTroy Hawkins and now the relief pitcher to own is Ottavino. He will be battling Rafael Betancourt for save opportunities, but Ottavino has the much higher upside. The former first round pick has pitched well out of the bullpen for two straight years for the Rockies and he should have solid numbers again in 2015. (about 30% owned)

Kevin Kiermaier TB | OF

This is a young outfielder that deserves a bit more attention from the fantasy world and I love his upside moving forward. He was solid in the minors and in 331 at bats last season he had 34 extra base hits and he threw in a little speed as well. Kiermaier already has six extra base hits on the young season and I think this youngster is the real deal. (about 25% owned)

Billy Butler OAK | 1B

Let’s not forget that just a few years ago Butler was supposed to be the next big thing at first base. He has a new home with the A’s and so far so good for Billy. At 29 years old I still think there is a good chance of him potentially returning to his old form. (about 55% owned)

Shane Greene DET | SP

Greene is the most interesting young starting pitcher that is owned in less than 75% of fantasy leagues. That’s not going to last long though, so if he is available in your league grab him now. He was solid in limited starts last year and I think there is a legit chance that he could be a top 40 starting pitcher this year. (about 60% owned)

Add in deeper leagues

Jimmy Nelson MIL | SP

Nelson is an extremely interesting young arm and it’s surprising that he isn’t owned in more leagues. He had a solid spring, he was great in the minors and his first start in the regular season was stellar. If you are looking for a young pitcher to take a gamble on then look no further. (about 20% owned)

Jake Lamb ARI | 3B

Lamb has all the upside in the world and the only thing holding him back is Aaron Hill. As of now he is splitting playing time with Hill, but I fully expect that to change as the year goes on. Lamb is just too good to keep on the bench and he will get more playing time as the year goes on. (about 20% owned)

Derek Norris SD | C

Norris isn’t going to blow you away with his numbers, but he does have some things going for him. He is a solid overall fantasy catcher and I like how many at bats he has been getting. At the very least you know he isn’t going to get rested that often. If you are waiting out an injured Yan Gomes or Matt Wieters, then you might want to consider Norris. (about 50% owned)

Kendrys Morales KC | 1B

At this point Morales is a bit older and he hasn’t been all that great the last couple of years. Even with that being said I think he still has the potential of returning close to his old form. I think 20+ home runs with an average over .280 is very likely this year. (about 25% owned)

DJ LeMahieu COL | 2B

LeMahieu has been on fire so far this year and it’s surprising that more fantasy owners aren’t picking this guy up. Obviously his .500 batting average is fluky, but he is still a young player with an upside at a tough position to fill. If you at all need help at second base then I would grab this guy and see if he has a breakout year. (about 25% owned)

Anthony Gose DET | OF

Gose has had stints in the bigs in each of the last three seasons, but he hasn’t had much success. However, it seems like the young outfielder has figured something out because he has been amazing so far in 2015. The starting center fielder has been hitting leadoff for the Tigers and that should mean plenty of scoring opportunities on that high powered offense. (about 50% owned)

Anthony DeSclafani CIN | SP

DeSclafani has been amazing so far this year and the young right hander certainly has my attention. He was solid in the minors and the 25 year old could be on the verge of a breakout season. If you need help with your starting pitching then I love the gamble of adding this youngster to your squad. (about 10% owned)

Keep an eye on

David Peralta ARI | OF

Peralta was my favorite deep sleeper heading into the season, but he hasn’t done much so far in 2015. This has lead to him being dropped in almost all leagues and he should stay there until he strings a couple of good games together. He is someone that I still very much believe in though and I would keep a close eye on this guy. (about 5% owned)