East Links: Grilli, Cano, Webster, Rendon

A pair of top prospects made their big league debuts yesterday, as Allen Webster started the second game of a double-header for the Red Sox and Anthony Rendon made his debut at third base for the Nationals with Ryan Zimmerman on the DL. Here's more on each, as well as some other news from baseball's Eastern divisions…

• Matt Gelb of the Philadelphia Inquirer chronicles Jason Grilli's ascension from the Phillies' Triple-A affiliate to Pirates closer. In 2011, the Phils called up six relievers instead of Grilli, despite his dominant numbers. Grilli had a clause in his contract stating that if another MLB team wanted him on their 25-man roster, the Phillies had to either call him up or release him. Pittsburgh scouts took notice of Grilli, called the Phillies, and Philadelphia elected to release him so he could sign with the Buccos.
• Sonia Cruz, the spokeswoman for Robinson Cano's foundation, appeared in the latest round of Biogenesis documents, according to TJ Quinn and Mike Fish of ESPN. Cruz's name was only connected to a pair of $300 payments, which she said were for her own weight loss interests. Mark Feinsand of the New York Daily News reports that MLB sources told him there was no link between Cano and Biogenesis. When he heard about the latest report, a surprised Cano told reporters, including Feinsand, "It's got nothing to do with me."
• Brian MacPherson of the Providence Journal examines the number of starting pitchers needed by the Red Sox in each season over the past decade and notes that the evidence suggests Webster will be back this season. MacPherson also adds that preliminary research indicates this is the earliest the Red Sox have ever turned to seven different starting pitchers in any season.
• The timing of Rendon's call-up suggests that the Nationals may be more willing to let him remain with the club all season than they've let on, writes Adam Kilgore of the Washington Post. Kilgore points out that Rendon has spent 20 days in the minor leagues, meaning his free agency has been delayed by a full year now.
• Jake Arrieta is at a crossroads with the Orioles, in the mind of the Baltimore Sun's Dan Connolly. At 27 years of age, Arrieta has passed the "prospect" stage but has yet to find the consistency to convert his above-average repertoire of pitches into consistent success. Connolly notes that it's not wise to trade someone with Arrieta's talent while his value is so low, but moving him to the bullpen hardly maximizes his value.
• Jon Heyman of CBS Sports reports that the Jay-Z's cerficiation process won't be complete anytime soon (Twitter link). As expected, CAA's Brodie Van Wagenen will handle Robinson Cano's extension talks.