None of the top candidates for the first overall pick in the upcoming amateur draft seem likely to command the $8.6MM+ bonus slotted for the #1 pick, MLB.com’s Jim Callis writes as part of a draft mailbag.  Callis notes that the Diamondbacks would likely save a couple of million on whomever they pick first overall, making the team’s explorations of taking a lesser-ranked prospect first to save even more bonus pool money seem rather needless.  “There’s no need to do a discount of $4 million or more, and it’s unlikely there will be enough quality players to spend that much extra money on in later rounds,” Callis writes.

Here’s more from the National League:

• The Marlins’ decision not to pursue Rafael Soriano does not indicate that the team is not going to look to spur change in its pen, MLB.com’s Joe Frisaro writes. Nevertheless, the focus is now internal. A.J. Ramos is just beginning his audition in the closer’s role, and should get a fairly long look. Otherwise, righties David Phelps and Tom Koehler could be shifted to full-time bullpen roles. It makes sense for Miami to see how things look with in-house changes now, of course, to gather information before the summer trade market heats up.
• Mets second baseman Dilson Herrera is headed to the DL with a broken middle finger on this throwing hand, Adam Rubin of ESPNNewYork.com reports (Twitter links). Third baseman and utilityman Eric Campbell will slide into the mix for the time being. It remains to be seen how long Herrera will be out, but his absence could impact the club in a multitude of ways. For one thing, it reduces (or even eliminates) the possibility that Herrera will seize the everyday job and render Daniel Murphy a trade piece — an admittedly somewhat unlikely scenario to begin with, especially given David Wright’s prolonged absence. Also of note: the decision to tab Campbell means that the team is not yet ready to bump Wilmer Flores off of shortstop, which was at least a theoretical alternative if Matt Reynolds had received the call. Unless and until Flores can curb his difficulties in the field, the position will remain an area of focus. As Andy Martino of the New York Daily News writes, the overall disposition in New York (particularly given the context of a five-game losing streak) is not terribly sunny at present.
• The Rockies’ shortstop situation is also going to continue to get press, albeit for somewhat different reasons. Dave Cameron of Fangraphs takes a shot at valuing Troy Tulowitzki, opining that the excellent but oft-injured star would probably command something north of the Jacoby Ellsbury contract. That implies something like $50MM to $60MM in excess value in his contract, says Cameron, indicating that Tulo might bring back a package of very good prospects rather than one headlined by a super-premium young player. (Though, as Cameron notes, we should expect some mark-up for an in-season deal. Last year’s Jeff Samardzija–Addison Russell trade certainly illustrates that point.) The article suggests some possible groups of players that could theoretically be offered to Colorado.