Today's Online Commentary & Diversions:

• Review/Interview: It's baseball's opening day, and The Comics Reporter's Tom Spurgeon notes the occasion with his look at 21: The Story of Roberto Clemente and chat with the book's creator, Wilfred Santiago.

Spurgeon's comments on the book: "Santiago brings the same playful complexity to the story of the Puerto Rican baseball slugger and humanitarian that he's put on thrilling display in previous comics. Many of the pages are to die-for gorgeous, and Santiago routinely finds compelling visual solutions to communicating the physicality and grace of a player whose heyday was long enough ago we have more stories than film to go by. The insights into the man's personal life are perhaps even more engagingly portrayed. As biography, 21 is admirably restrained and leaves a lot to the reader's interpretation of what they're seeing on the page. It is a book bristling with intelligence that will bear re-reading in the same way that Roberto Clemente continues to invite our regard and admiration for his accomplishments on and off the field."

From Wilfred: "To an extent, that's Clemente. Clemente didn't waste much time. Everything was urgent to him. The pace of the book tried to capture that sort of non-pause, that sort of way of going forward without slowing down. He does have what you just said -- exuberance -- and that's such an important part of his life. So you approach it the same way. When you think about it, that's exactly the way he died, too. He could have slowed down."

• Plug: "A shooting star that brightened the game in the '70s, Roberto Clemente broke cultural divides and game records and grasps on just what a baseball athlete could accomplish inside a long-storied sport. Writer and cartoonist Wilfred Santiago brings a graphic novel [21] that details the bio of a beloved player still, decades after his abrupt death." – Mark Ruffin, Examiner.com

• Feature: At the Drawing Words & Writing Pictures blog, Best American Comics series co-editor Jessica Abel spotlights Anders Nilsen's Monologues for Calculating the Density of Black Holes as a 2010 Notable Comic: "Characters drift in and out, talking to the reader, beating each other up, and discussing philosophy in a way that makes you think Nilsen both believes and doesn’t believe this stuff. Really, it’s one of a kind. Except for Monologues for the Coming Plague, of course. But it’s funnier than that one."

• Plug: "In his comics, the Swiss illustrator [Thomas Ott], 44, usually begins with a pencil drawing, then copies it with tracing paper. Then transfers the image to black paper and scrapes with the aid of a stylus. Too much work? Yes, but the technique, known as scratchboard, impresses. Check out... a small sample of the new album [R.I.P.: Best of 1985-2004] — a selection of nearly 20 years of work by the author — and dare to disagree. The images are disturbing, but beautiful." – Telio Navega, O Globo (translated from Portuguese)